barbus haasi , or the " catalan barbel " ( catalan : barb cua-roig ; spanish : barbo colirrojo or barbo de cola roja ) , is a species of freshwater fish in the family cyprinidae .

it is a small size barbel found only in the northeast of the iberian peninsula .

morphologically it is similar to barbus bocagei , but it is smaller and rarely reaches sizes longer than 20 cm .

its natural habitats are rivers and inland karsts in all ebro basin , but mainly in inner catalonia , especially in the bages comarca area .

the species is threatened by habitat loss and the introduction of non-native species such as the pumpkinseed ( lepomis gibbosus ) and the wels catfish ( silurus glanis ) .

barbus haasi

barbus haasi <EOT> outbreaks of ichthyophthirius multifiliis in redtail barbs barbus haasi in a mediterranean stream during drought .

ectoparasites of native cyprinid barbus haasi : first record of trichodina acuta and trichodina fultoni in iberian catchments .

outbreaks of ichthyophthirius multifiliis in redtail barbs barbus haasi in a mediterranean stream during drought . - pubmed - ncbi

reproduction and growth of barbus haasi in a small stream in the n . e . of the iberian peninsula - archiv für hydrobiologie volume 142 number 1 — schweizerbart science publishers

parasitological studies of wild freshwater fish in iberia are needed to provide baseline data for management strategies , but the conservation status of many species means application of non - lethal sampling procedures is mandatory . a survey of iberian redfin barbel ( barbus haasi ) from five mediterranean streams in north - eastern of spain using mucus scrapings revealed the presence of trichodina acuta , t . fultoni and gyrodactylus spp . with prevalences of 35 - 60 % , 8 % , 2 - 50 % and densities of 54 - 197 , 42 - 89 , 2 - 50 parasites / mm2 on fish skin , respectively . biometrics of the trichodinid species are provided , and we discuss the potential application of trichodinids as eutrophication bioindicators in these rivers .

justification : b . haasi has undergone an estimated population decline of 30 % in the past ten years mainly due to pollution and extraction , introduced species and habitat destruction ( crivelli , a . pers comm ) . this decline is likely to continue into the future at the same rate with desiccation being the main threat ( carmona , j . pers comm ) .

diagnosed from other species of barbus and luciobarbus in iberian peninsula by having the following characters : body with numerous small black dots , more or less aligned in longitudinal series along scale rows ; anal , part of caudal and pelvic fins red during spawning season ; lower lip with a median lobe ; last simple dorsal ray slender , with small or without serrae posteriorly ; and lateral line with 46 - 50 + 3 - 4 scales ( ref . 59043 ) .

in 2008 , inland waterways in catalonia ( northeast iberian peninsula , spain ) experienced one of the worst droughts recorded in this region in recent decades . during this period , an epizootic of ichthyophthirius multifiliis was detected for the first time in a mediterranean stream , with 21 % prevalence in a population of redtail barbs barbus haasi . environmental features and the fish population in this stream were compared during 2007 - 2009 . fish density and the average fish size were reduced significantly after the outbreak of i . multifiliis in this population . during 2008 , parasitized fish were significantly larger than nonparasitized fish . in addition , a significant , positive correlation was found between parasite load and fish size . the origin of i . multifiliis is unknown , but an introduced species detected in april 2007 may have carried it . the combination of stress to the redtail barbs due to suboptimal conditions and favorable environmental conditions for parasite multiplication ( e . g . , suitable water temperature and low water flow ) could have enhanced fish susceptibility to the parasite in april 2008 . further studies are needed to establish the incidence of freshwater fish diseases in mediterranean watersheds , and water management policies should be reviewed to improve the conservation of native fish fauna .

maturity : l m ? range ? - ? cm max length : 30 . 0 cm tl male / unsexed ; ( ref . 31730 )

occurs in water bodies on low - lying plains , with little current ; in water courses at high altitudes and in springs and associated wetlands ( ref . 26100 ) . most frequently found in upper , cooler stretches of streams , with current and stone bottom . feeds mainly on benthic macro - invertebrates , especially insect larvae . spawns on vegetation and under stones ( ref . 59043 ) . is threatened by water abstraction , pollution , and habitat destruction ( ref . 26100 ) .

kottelat , m . and j . freyhof , 2007 . handbook of european freshwater fishes . publications kottelat , cornol and freyhof , berlin . 646 pp . ( ref . 59043 )

phylogenetic diversity index ( ref . 82805 ) : pd 50 = 0 . 5000 [ uniqueness , from 0 . 5 = low to 2 . 0 = high ] .

bayesian length - weight : a = 0 . 00977 ( 0 . 00617 - 0 . 01549 ) , b = 3 . 02 ( 2 . 89 - 3 . 15 ) , in cm total length , based on lwr estimates for this species & genus - body shape ( ref . 93245 ) .

trophic level ( ref . 69278 ) : 3 . 4 ±0 . 38 se ; based on food items .

resilience ( ref . 69278 ) : medium , minimum population doubling time 1 . 4 - 4 . 4 years ( k = 0 . 17 ; tm = 1 - 4 ) .

vulnerability ( ref . 59153 ) : high vulnerability ( 62 of 100 ) .

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carmona , j . & darwall , w . ( mediterranean workshop , dec . 2004 )

it is restricted to headwaters of streams belonging to the ebro river basin and to several coastal river basins in spain .

it is a small size barbel ( < 220 mm ) , living in the upper part of rivers with cold , rapidly running waters and gravel stony substrate . reproduction takes place between april and june . life span is 5–6 years .

water pollution and extraction and invasive species have been the main threats . dam construction is also destroyng some of the species habitat . desiccation is seen as a major future threat to the species .

listed on annex v of the european union habitats directive as b . copito .

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also known as barbo de cola roja ( barbo colirrojo ) , the catalonian barbel is a small barbel ( cyprinidae ) found in the cold , running waters of mountain streams in the ebro river catchment and several other coastal river basins of catalonia in eastern spain . listed on the iucn red list as vulnerable , it has undergone an estimated population decline of 30 % in the past ten years mainly due to pollution and extraction , introduced species , dam construction and habitat destruction . the iucn states that this decline is likely to continue into the future at the same rate with desiccation cited as being the main threat . the beautiful limestone mountains and green crystal clear waters of the upper matarranya river at el parrissal near beceite is a great place to visit and explore . the area is part of the national park ports de beseit and all swimming is prohibited in order to protect the aquatic life , including an endangered species of crayfish . this video was filmed with an old gopro hero hd camera placed in the shallows at the water edge . the fish were naturally schooling in this area , there was no enticement with baits etc . there will also be an edited version available soon giving more of an idea of this biotope and some of the other creatures that inhabit the area . © greg wallis urltoken

discus , angel fish , and german blue rams . welcome to the beast tank

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disclaimer : itis taxonomy is based on the latest scientific consensus available , and is provided as a general reference source for interested parties . however , it is not a legal authority for statutory or regulatory purposes . while every effort has been made to provide the most reliable and up - to - date information available , ultimate legal requirements with respect to species are contained in provisions of treaties to which the united states is a party , wildlife statutes , regulations , and any applicable notices that have been published in the federal register . for further information on u . s . legal requirements with respect to protected taxa , please contact the u . s . fish and wildlife service .

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maceda - veiga a 1 , salvadó h , vinyoles d , de sostoa a .

departament de biologia animal , facultat de biologia , universitat de barcelona , avda , diagonal 645 , e - 08028 barcelona , spain . albertomaceda @ urltoken

archiv für hydrobiologie volume 142 number 1 ( 1998 ) , p . 95 - 110

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to cite this page : myers , p . , r . espinosa , c . s . parr , t . jones , g . s . hammond , and t . a . dewey . 2018 . the animal diversity web ( online ) . accessed at https : / / animaldiversity . org .

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< p > this section displays by default the canonical protein sequence and upon request all isoforms described in the entry . it also includes information pertinent to the sequence ( s ) , including < a href = " urltoken " > length < / a > and < a href = " urltoken " > molecular weight < / a > . < p > < a href = ' / help / sequences _ section ' target = ' _ top ' > more . . . < / a > < / p >

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< p > the checksum is a form of redundancy check that is calculated from the sequence . it is useful for tracking sequence updates . < / p > < p > it should be noted that while , in theory , two different sequences could have the same checksum value , the likelihood that this would happen is extremely low . < / p > < p > however uniprotkb may contain entries with identical sequences in case of multiple genes ( paralogs ) . < / p > < p > the checksum is computed as the sequence 64 - bit cyclic redundancy check value ( crc64 ) using the generator polynomial : x < sup > 64 < / sup > + x < sup > 4 < / sup > + x < sup > 3 < / sup > + x + 1 . the algorithm is described in the iso 3309 standard . < / p > < p class = " publication " > press w . h . , flannery b . p . , teukolsky s . a . and vetterling w . t . < br / > < strong > cyclic redundancy and other checksums < / strong > < br / > < a href = " urltoken " > numerical recipes in c 2nd ed . , pp896 - 902 , cambridge university press ( 1993 ) < / a > ) < / p >

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galearctus avulsus is a species of slipper lobster that lives around new caledonia .

it was described in 2011 , having previously been included in galearctus kitanovirosus .

it differs from the other species of the genus galearctus most noticeably in the shape of a groove on the sternum .

galearctus avulsus

galearctus avulsus <EOT> taxid : 1008998 galearctus avulsus ( species ) , galearctus avulsus yang , chen & chan , 2011 ( authority ) , galearctus sp . chy - 2011 ( includes ) .

the following term was not found in genome : galearctus avulsus [ orgn ] .

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taxid : 1008997 galearctus rapanus ( species ) , galearctus rapanus ( holthuis , 1993 ) ( authority ) .

taxid : 521337 galearctus kitanoviriosus ( species ) , galearctus kitanoviriosus ( harada , 1962 ) ( authority ) , scyllarus kitanoviriosus ( synonym ) , scyllarus kitanoviriosus harada , 1962 ( authority ) .

taxid : 521364 galearctus timidus ( species ) , galearctus timidus ( holthuis , 1960 ) ( authority ) , scyllarus timidus ( synonym ) , scyllarus timidus holthuis , 1960 ( authority ) .

taxid : 521309 galearctus aurora ( species ) , galearctus aurora ( holthuis , 1982 ) ( authority ) , scyllarus aurora ( synonym ) , scyllarus aurora holthuis , 1982 ( authority ) .

this species was previously misidentified as galearctus kitanoviriosus ( t - . y . chan pers . comm . 2011 ) .

yang , c . ; chen , i . ; chan , t . ( 2011 ) . a new slipper lobster of the genus galearctus holthuis , 2002 ( crustacea , decapoda , scyllaridae ) from new caledonia . zoosystema . 33 ( 2 ) : 207 - 217 . , available online at urltoken [ details ]

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has been assessed as least concern . this species has a reasonably broad geographic range and faces no major threats .

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yang , chen & chan , 2011 . accessed at : urltoken ; = 762301 on 2018 - 07 - 09

this species is only known from its type locality on rapa iti , french polynesia : 2736s , 14416w ( holthuis 2002 ) .

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taxid : 59755 scyllaridae ( family ) , slipper lobsters ( genbank common name ) .

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urodeta aculeata is a moth of the family elachistidae .

it is found in cameroon .

the wingspan is about 6.3 mm .

the thorax , tegula and forewing are grey brown , mottled with blackish brown tipped scales .

the hindwings are brownish grey .

adults have been recorded in the beginning of may .

urodeta aculeata

urodeta aculeata <EOT> urodeta aculeata sruoga & prins , 2011 , sp . n . - plazi treatmentbank

urodeta aculeata sruoga & de prins , 2011 ; zootaxa 3008 : 4 ; tl : cameroon , north prov . , faro river camp , 08°25 ' n 012°47 ' e , 275m

figures 33 – 36 . urodeta aculeata , sp . n . , holotype . 33 , adult male . scale bar 1 mm ; 34 , head , latero - frontal view ; 35 , general view of male genitalia ( phallus removed ) ; 36 , phallus . gen . prep . mrac / kmma 0 0 601 , specimen id : rmca ent 0 0 0 0 0 5275 . scale bar 0 . 1 mm .

urodela [ = urodeta ] stainton , 1869 ; tineina south . europe : 226 ; ts : urodela [ sic ] cisticolella stainton

type species : urodeta cisticolella stainton , 1869 [ = u . hibernella staudinger , 1859 ] . the tineina of southern europe : 226 . by monotypy .

urodeta absidata sruoga & de prins , 2011 ; zootaxa 3008 : 4 ; tl : cameroon , north prov . , faro river camp , 08°23 ' n 012°49 ' e , 275m

urodeta crenata sruoga & de prins , 2011 ; zootaxa 3008 : 7 ; tl : cameroon , north prov . , faro river camp , 275m , 08°23 ' n 012°40 ' e

urodeta cuspidis sruoga & de prins , 2011 ; zootaxa 3008 : 4 ; tl : cameroon , north prov . , faro river camp , 08°25 ' n 012°47 ' e , 275m

urodeta falciferella ; kaila & sugisima , 2011 , monogr . austr . lepid . 11 : 16 ; de prins & sruoga , 2012 , zootaxa 3488 : 54 ; [ afromoths ]

urodeta faro sruoga & de prins , 2011 ; zootaxa 3008 : 9 ; tl : cameroon , north prov . , faro river camp , 08°23 ' n 012°49 ' e , 275m

urodeta gnoma ; kaila & sugisima , 2011 , monogr . austr . lepid . 11 : 16 ; de prins & sruoga , 2012 , zootaxa 3488 : 55 ; [ afromoths ]

urodeta maculata ; kaila & sugisima , 2011 , monogr . austr . lepid . 11 : 16 ; de prins & sruoga , 2012 , zootaxa 3488 : 55 ; [ afromoths ]

urodeta quadrifida sruoga & de prins , 2012 ; zootaxa 3488 : 48 ; tl : s . africa , gauteng , 1000m , tswaing crater reserve , 26°28 ' s 23°46 ' e

urodeta taeniata ; kaila & sugisima , 2011 , monogr . austr . lepid . 11 : 16 ; de prins & sruoga , 2012 , zootaxa 3488 : 56 ; [ afromoths ]

urodeta tortuosa sruoga & de prins , 2011 ; zootaxa 3008 : 10 ; tl : cameroon , north prov . , faro river camp , 08°23 ' n 012°49 ' e , 275m

urodeta trilobata sruoga & de prins , 2012 ; zootaxa 3488 : 51 ; tl : s . africa , gauteng , 1100m , tswaing crater reserve , 25°24 ' s 28°05 ' e

urodeta acinacella sruoga & de prins , 2012 ; zootaxa 3488 : 48 , 53 ; tl : s . africa , gauteng , 1100m , tswaing crater reserve , 25°24 ' s 28°05 ' e

urodeta acerba sruoga & de prins , 2011 ; zootaxa 3008 : 5 ; tl : democratic republic of the congo , bas - congo , nature res . luki - mayumbe , 05°27 ' s 13°05 ' e , 320m

urodeta bucera sruoga & de prins , 2011 ; zootaxa 3008 : 6 ; tl : democratic republic of the congo , bas - congo , nature res . luki - mayumbe , 05°27 ' s 13°05 ' e , 320m

urodeta talea sruoga & de prins , 2011 ; zootaxa 3008 : 9 ; tl : democratic republic of the congo , bas - congo , nature res . luki - mayumbe , 05°27 ' s 13°05 ' e , 320m

sruoga v . & de prins j . 2012 . a review of the taxonomic history and biodiversity of the genus urodeta ( lepidoptera : elachistidae : elachistinae ) , with description of new species . - zootaxa : 1–22 .

urodeta inusta kaila , 2011 ; monogr . austr . lepid . 11 : 45 , pl . 1 , f . 1 - 2 ; tl : western australia , 163km se by e broome , 18°49 ' s 123°17 ' e

larva on cistus monspeliensis [ me5 ] , 195 , cistus salviaefolius , c . ladaniferus , c . x _ ledon de prins & sruoga , 2012 , zootaxa 3488 : 55

phthinostoma maculata mey , 2007 ; esperiana memoir 4 : 21 , pl . 1 , f . 7 ; tl : namibia , waterberg national park

phthinostoma taeniata mey , 2007 ; esperiana memoir 4 : 22 ; tl : namibia , otavi mts . , varianto farm

[ afromoths ] de prins , j . & de prins , w . , 2013

sangmi lee , richard brown & sibyl bucheli . gelechioidea - a global framework ;

[ maps ] warning ! the maps are automatically generated from the textual information , and the process does not always produce acceptable result ; see about maps for more info .

staudinger , 1859 diagnosen nebst kurzen beschreibungen neuer andalusischer lepidopteren stettin ent . ztg 20 ( 7 - 9 ) : 211 - 259

if you have corrections , comments or information to add into these pages , just send mail to markku savela keep in mind that the taxonomic information is copied from various sources , and may include many inaccuracies . expert help is welcome .

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stainton h . t . 1869 . the tineina of southern europe . - — : i ~ viii , 1–370 .

sruoga v . & de prins j . 2011 . new species of elachistinae ( lepidoptera : elachistidae ) from cameroon and the democratic republic of the congo . - zootaxa 3008 : 1–32 .

sruoga v . & de prins j . 2009 . the elachistinae ( lepidoptera : elachistidae ) of kenya with descriptions of eight new species . - zootaxa 2172 : 1–31 .

mey w . 2007b . microlepidoptera : smaller families . – in mey , w . ( ed . ) the lepidoptera of the brandberg massif in namibia . part 2 . - esperiana memoir 4 : 9–30 .

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sruoga , virginijus & prins , jurate de , 2011 , new species of elachistinae ( lepidoptera : elachistidae ) from cameroon and the democratic republic of the congo , zootaxa 3008 , pp . 1 - 32 : 6

river camp , 275 m , 08° 25 ’n 012° 47 ’e , 04 . v . 2005 , leg . j . & w . de prins . specimen id : rmca

, known from kenya ( for external characters and male genitalia refer to sruoga & de prins 2009 ) . however , the forewing in the new species is without white oblique streak as in

, as both these species have well developed , apically rounded juxta lobes and vesica with few large and numerous small cornuti . these species can be separated most easily by the shape of valva , the number of large cornuti and the very peculiar medial carina of phallus in

) . uncus short . spinose knob of gnathos wider than long , rounded apically . valva short and broad ; sacculus ventrally curved at obtuse angle ; cucullus short and narrow , tapered apically ; transtilla short , strongly sclerotized . ventral shied of juxta large ; juxta lobes well developed , apically bilobed . vinculum ushaped , proximal margin concave . phallus short , as long as valva , with strongly sclerotized narrow streak along ventral margin ; medial carina of phallus long , apically bent ; vesica with 3 large cornuti and two groups of smaller cornuti : basal group with long and very narrow cornuti , medial group with larger ones , slightly different in size .

flight period . the only one known specimen was captured in the beginning of may .

etymology . the species name is derived from the latin aculeatus ( provided with prickles ) in reference to the numerous cornuti .

remarks . in the male genitalia the juxta apically is fused with the phallus , therefore during preparation , if the phallus is removed , the juxta lobes can be separated from the juxta along with the phallus .

figures 1 – 5 . collecting localities of the afrotropical elachistinae species . 1 , cameroon , north province , faro river floodplain ; 2 , drc , bas - congo , mayumbe forest ; 3 , general map indicating collecting sites ; 4 , collecting site in cameroon ; 5 , collecting site in drc .

no known copyright restrictions apply . see agosti , d . , egloff , w . , 2009 . taxonomic information exchange and copyright : the plazi approach . bmc research notes 2009 , 2 : 53 for further explanation .

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dichomeris xuthochyta is a moth in the gelechiidae family .

it was described by turner in 1919 .

it is found in australia , where it has been recorded from queensland .

the wingspan is about 10 mm .

the forewings are fuscous with the discal dots very obscurely darker , the plical beyond the first discal .

the hindwings are fuscous with a large tornal ochreous blotch extending from mid-dorsum to mid-termen .

dichomeris xuthochyta

dichomeris xuthochyta <EOT> this is the place for xuthochyta definition . you find here xuthochyta meaning , synonyms of xuthochyta and images for xuthochyta copyright 2017 © urltoken

vad betyder dichomeris ? här finner du 2 definitioner av dichomeris . du kan även lägga till betydelsen av dichomeris själv

dichomeris är ett släkte av fjärilar som beskrevs av hübner 1818 . dichomeris ingår i familjen stävmalar .

here you will find one or more explanations in english for the word xuthochyta . also in the bottom left of the page several parts of wikipedia pages related to the word xuthochyta and , of course , xuthochyta synonyms and on the right images related to the word xuthochyta .

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the white-tailed jackrabbit ( lepus townsendii ) , also known as the prairie hare and the white jack , is a species of hare found in western north america .

like all hares and rabbits , it is a member of the family leporidae of order lagomorpha .

it is a solitary individual except where several males court a female in the breeding season .

litters of four to five young are born in a form , a shallow depression in the ground , hidden among vegetation .

this jackrabbit has two described subspecies : l. townsendii townsendii occurring west of the rocky mountains and l. townsendii campanius occurring east of the rocky mountains .

white - tailed jackrabbit

white - tailed jackrabbit <EOT> in sympatry with lepus californicus - black - tailed jackrabbit , the white - tailed jackrabbit appears to be more selective over the plant species it consumes . ( b430 . w2 )

the white - tailed jackrabbit is thought to be extinct in missouri and possibly also nebraska and kansas ( 1 ) .

the white - tailed jackrabbit is classified as least concern ( lc ) on the iucn red list ( 1 ) .

the white - tailed jackrabbit is classified as secure in the current general status of alberta wild species report . see :

an additional threat to the white - tailed jackrabbit is competition with the black - tailed jackrabbit . this more common species has spread with the expansion of agriculture as it has a generalist diet and can exploit habitats degraded by grazing livestock . where both the white - tailed and black - tailed jackrabbits occur , the white - tailed jackrabbit tends to be displaced as it is less efficient at foraging in degraded habitats ( 1 ) ( 3 ) .

habitat : the white - tailed jackrabbit is typically found in open grasslands , forests , pastures , and fields . [ 2 ]

female black - tailed jackrabbit do not prepare an elaborate nest . they give birth in shallow excavations called

a few populations of white - tailed jackrabbits are present in wisconsin . ( b430 . w2 )

" courtship behavior is similar to that of the black - tailed jackrabbit [ lepus californicus - black - tailed jackrabbit ] , except that the jumping behavior is more pronounced . " ( b605 . 4 . w4 )

" the summer pelage of the white - tailed jackrabbit is yellowish to grayish - brown on the upperparts and white or pale gray on the underparts . the throat is darker . " ( b430 . w2 )

embed this arkive thumbnail link ( " portlet " ) by copying and pasting the code below . < a href = " urltoken " title = " arkive species - white - tailed jackrabbit ( lepus townsendii ) " > < img src = " urltoken " alt = " arkive species - white - tailed jackrabbit ( lepus townsendii ) " title = " arkive species - white - tailed jackrabbit ( lepus townsendii ) " border = " 0 " / > < / a >

the white - tailed jackrabbit has not been the target of any known conservation measures . it is recommended that further research is conducted into this speciesâ€™ biology and populations , as well as its relationship with the black - tailed jackrabbit , so that informed conservation measures may be made in future . it is also recommended that the white - tailed jackrabbit be removed from the list of vermin in the state of wyoming ( 1 ) .

the white - tailed jackrabbit is most commonly found in open prairie and plains , but also occurs in montane shrublands among pine forests and alpine tundra . it has been recorded up to elevations of over 4 , 000 metres in colorado ( 1 ) ( 4 ) . where the white - tailed jackrabbit is in competition with the black - tailed jackrabbit ( lepus californicus ) , it tends to move to higher elevations ( 2 ) .

" in mountainous habitats , white - tailed jackrabbits predominate on the slopes and ridges and black - tailed jackrabbits are more common on the valley floors . " ( b430 . w2 )

this species is slightly larger than lepus californicus - black - tailed jackrabbit . ( b430 . w2 , b605 . 4 . w4 )

breeding season the breeding season of white - tailed jackrabbits lasts from february to july with a peak from march to june .

in some areas , the white - tailed jackrabbit is considered an agricultural pest , particularly of alfalfa , corn , soybeans and winter wheat , and has been persecuted as a result ( 7 ) .

it is distinguished from lepus californicus - black - tailed jackrabbit by the white , not black , dorsal side to the tail - as indicated by the common name . ( j469 . 288 . w1 )

white - tailed jackrabbits are a large population and are considered a “least concern” species by the iucn red list of threatened species .

white - tailed jackrabbits ( or lepus townsendii ) are grassland species that have migrated to urban centres as their prairie habitat shrinks .

, foxes , and wild cats . the black - tailed jackrabbit has no prey . this is because the species only feeds on plant material .

description : the white - tailed jackrabbit’s coat color varies with season and habitat . the back ranges from yellowish to grayish brown in color while the underside is white or grey . the throat and face are darker with coarser hair . its tail is white with a buffy dorsal stripe . their ears are rimmed in white and tipped in black . two distinguishing features are their large ears and hind legs . [ 2 ]

diet : white - tailed jackrabbits are strict herbivores . they want grasses , forbs , and shrubs in varying amounts . [ 2 ]

similar species : the white - tailed jackrabbit is the least social of all hares . [ 2 ] they can also be distinguished from other hares due to their prominent flanges projecting from the sides . [ 1 ]

montana has four true rabbits—pygmy rabbit , desert cottontail , mountain cottontail , and eastern cottontail—and three hares—white - tailed jackrabbit , black - tailed jackrabbit , and snowshoe hare . the whitetail is yellowish - gray , has a distinct white tail , and turns all white in winter except for its ear tips , which remain black . the blacktail is gray to blackish , has a black tail , and does not change color in winter .

the white - tailed jackrabbit really isn ' t a rabbit at all , but a hare ! confused ? well , the main difference is that baby hares are born well furred with their eyes open , and can move around shortly after birth , whereas rabbit babies are born blind , hairless , and helpless . in minnesota , our two hare species are the white - tailed jackrabbit and snowshoe hare , and our only rabbit species is the cottontail .

who are these creatures sharing our city with us ? that question has taken dr . john wood and his students into the streets and parks of edmonton many a wintry night . their quest : the white - tailed jackrabbit .

in oregon , open flats and ryegrass fields , rather than sagebrush used by lepus californicus - black - tailed jackrabbit . ( j469 . 288 . w1 )

a large hare of north america , the white - tailed jackrabbit ( lepus townsendii ) is most easily recognised by its long , antennae - like ears , which are grey on the outside , white and brown on the inside , and have conspicuous black tips . this species is the only jackrabbit that has two annual moults . during the summer , the thin , coarse coat is dark brown to greyish - brown on the upperparts and white or pale grey on the underparts . in northern parts of its range , where snowfall is regular , the white - tailed jackrabbit becomes all white during winter with some grey around the eyes and throat . however , in southern parts of its range , it only develops white sides . the tail , which gives this hare its common name , it white all year round , with a dusky stripe on the upper side ( 3 ) ( 4 ) ( 5 ) .

white - tailed jackrabbits live in grasslands and shrublands throughout montana except in the far northwest . they are most common in open grassland plains east of the continental divide . ( in montana , black - tailed jackrabbits live only in the state’s far southwestern corner . ) though information on white - tailed jackrabbits is scarce , the population appears to be doing fine .

color : in summer , the jackrabbit is brown gray , with a white belly , feet , and tail . in winter , the fur changes to white , with somewhat darker ears . in more southern climates , jackrabbits do not change color .

white - tailed jackrabbits are abundant through most of their range and have no special conservation status . they are considered " least concern " by the iucn . the subspecies

" early authors maintained that white - tailed jackrabbits adjusted well to agricultural development , but decline of numbers now seems general . " ( b605 . 4 . w4 )

white tail . this sometimes has a dusky dorsal stripe . ( b430 . w2 )

in winter , the jackrabbit browses on the buds , bark and branches of shrubs and small trees .

the white - tailed jackrabbit is a favorite prey of animals such as foxes , coyotes , cougars , badgers , bobcats , snakes , eagles , and owls . they avoid predators by lying perfectly still . they are also proficient swimmers , which helps them to escape predators . [ 2 ]

white - tailed jackrabbits are strict herbivores . they feed on grasses , forbs , and shrubs in varying amounts . in the summer months , when many succulent plants are readily found ,

white - tailed jackrabbits are an important prey source for medium to large sized predators in the ecosystems in which they live . they also impact vegetation community composition through their grazing activities .

built for speed , with a slender , lean body and well developed , long hind limbs , the white - tailed jackrabbit is capable of bursts of speed of up to 40 miles per hour . this athletic mammal is even able to jump higher than 3 . 6 metres ( 3 ) .

this species has greyish - brown upperparts and white underparts . the tail is also white , though has a dusky or buff stripe on the top . ( b605 . 4 . w4 )

dr . wood compares the joy of studying the white - tailed jackrabbit to being bartholomew cubbins with his 500 hats . “every time you take one off , there’s another one . you never get to essence , you’re always discovering something new—and the closer you look , the more fascinating it is . ”

like the pronghorn , whose open grassland range it shares , the white - tailed jackrabbit relies on eyesight and speed to avoid coyotes , bobcats , foxes , golden eagles , and other predators . a frightened jackrabbit can cover 30 feet in one leap and reach speeds of up to 35 mph in short bursts . as it bounds along , it regularly jumps 3 to 4 feet high , apparently to get a better view of its pursuer . when captured by a predator , a jackrabbit fights back by kicking with its powerful hind legs .

white - tailed jackrabbits prefer open grasslands but thrive in pastures and fields . this species can also be found in forested areas up to high alpine tundra , from 40 to 4300 meters elevation .

activity : white - tailed jackrabbits are nocturnal . they generally feed from sunset to sunrise and rest in shallow forms during the day . they do not hibernate in the winter . [ 2 ]

the white - tailed jackrabbit , or " jack , " is the largest member of the rabbit and hare family , weighing from six to ten pounds . the long - legged jackrabbit is best recognized by its unusual style of running . when surprised , it will usually bound off with a gait resembling that of a kangaroo . but when frightened , it will drop low to the ground and accelerate to an amazingly fast speed . it is rarely seen because it is active mainly at night , and turns white in winter .

range : the white - tailed jackrabbit’s range within the united states including : washington , oregon , california , nevada , idaho , montana , wyoming , utah , colorado , new mexico , nebraska , kansas , north and south dakota , minnesota , wisconsin , iowa , missouri , and illinois . [ 3 ]

while the population status of the white - tailed jackrabbit is currently unclear , declines have been observed in many areas . in yellowstone national park , where this species was once considered abundant , there have been no sightings since the 1990s , while in grand teton national park , there have only been three sightings since 1978 ( 1 ) . the white - tailed jackrabbit has also not been seen in british colombia since 1980 ( 3 ) . the reasons behind these declines are unknown , but it is possibly due to a combination of severe weather , disease , predation , habitat destruction and habitat degradation by livestock ( 1 ) .

this jackrabbit finds it difficult to run in snow more than 25 cm deep . ( j469 . 288 . w1 )

black - tailed jackrabbits are not listed as threatened or endangered . the white - tailed jackrabbit , lepus townsendii is listed as a species of special concern by several states including california . habitat availability is threatened to some extent by development and in some areas populations are dwindling . their large numbers in orchards , agricultural fields , and rangelands can do considerable damage and ranchers and farmers often need to cull the populations .

in summer , the white - tailed jackrabbit feeds on grasses , forbs and cultivated crops . at other times of the year , this species browses on twigs , buds and bark . it is mostly active at dusk and dawn , resting in shallow depressions at the base of bushes during the day ( 1 ) .

" the white - tailed jackrabbit is distributed in west - central north america from the prairies of southern saskatchewan and alberta to the rocky mountains of northern new mexico , and from lake michigan in wisconsin to east of the cascade mountains of washington and the sierra nevada mountains of california . " ( b430 . w2 )

among the most solitary of hares , the white - tailed jackrabbit is usually found alone , and only briefly interacts with other hares during the breeding season ( 2 ) . breeding takes place from late february to mid - july , when groups of males chase females . this involves dashes , jumps and circling sprints and ends in a brief copulation . female white - tailed jackrabbits may produce between 1 and 4 litters a year , usually of 4 or 5 young , after a gestation period of 30 to 43 days . the young have some ability to move around within half an hour of birth and begin foraging on their own at two weeks of age . the young are then weaned at one month old and are completely independent at two months ( 3 ) . the white - tailed jackrabbit is thought to live for up to five years ( 1 ) .

braun , c . e . and r . g . streeter . 1968 . observations on the occurrence of white - tailed jackrabbits in the alpine zone . j . mammal . 49 : 160 - 161 .

white - tailed jackrabbits were a significant food source for early settlers of north america and continue to be a year round game animal . their pelts were once highly prized and widely used in the commercial fur industry .

a widespread species , the white - tailed jackrabbit is found across much of southern canada and the central united states . its range stretches from the great plains in saskatchewan , south to the rocky mountains in extreme northern new mexico , and east of the cascade mountains in oregon , to lake michigan in wisconsin ( 1 ) ( 6 ) .

although the black - tailed part of the black - tailed rabbit’s name is correct in that its tail is black , the rabbit part is not . these animals are hares , not rabbits . several factors distinguish hares from rabbits . hares have a leaner body and longer ears and legs , usually do not build nests , and their young are born well - furred with their eyes wide open . three species of hares are native to california , the snowshoe , black - tailed , and white - tailed . the latter two are commonly called jackrabbits . black - tailed are the most abundant and widespread of all the jacks and the only one found in desert habitats .

the white - tailed jackrabbit is the least social of all hares . in terms of communication , the species generally make no vocal noises , but screams if caught or injured . they have acute hearing and a sharp sense of smell . they also have good vision and whiskers that allow them to navigate to find food . these senses help them perceive their environment .

the tail remains white throughout the year , though some may have a buffy dorsal stripe . ( b430 . w2 )

size : white - tailed jackrabbits weigh 6 . 61 to 8 . 81 lbs ( 3 to 4 kg ) , and range from 22 to 25 . 6 inches ( 558 - 650 mm ) in total length . [ 1 ]

white - tailed jackrabbits are often viewed as a threat by farmers as they can destroy crops , eat hay stores , and girdle trees ( chapman et al . , 1982 ) . because of low population densities and grassland preferences , the impact of

white - tailed jackrabbits are classed as a " game species " in minnesota , and during the autumn and early winter hunting season , several thousand are killed each year for their meat . but predators take several times more jacks than do hunters .

white - tailed jackrabbits are one of the world’s largest hares , second only to the alaskan hare . they are 2 feet long from their nose to their 3 - to 4 - inch - long stubby tail , and weigh 6 to 10 pounds . because of the animals’ large ears , early settlers called them “jackass rabbits , ” later shortened to jackrabbit . its large ears allow a jackrabbit to hear exceptionally well . also , the ears are filled with blood vessels that release body heat in summer , keeping the animal cool when temperatures rise .

lepus townsendii is greyish brown ( lepus townsendii townsendii or yellowish ( lepus townsendii campanius ) dorsally ( white in winter in northern areas and high altitudes ) with a pale grey or white underside , black ear tips and a white tail which may have a slender buffy or dusky dorsal stripe ; when present this stripe does not extend up the back ( j469 . 288 . w1 )

assess abundance , distribution , and trends . improve understanding of jackrabbit ecology , including habitat associations and selection . develop methods to census this nocturnal species .

white - tailed jackrabbits live at a remarkably broad range of elevations , from 40 m to 4 , 300 m , and where they are in competition with black - tailed jackrabbits , they tend to move toward higher elevations . they are slightly larger than black - tails , but seem to be more selective in their dietary choices , putting them at a disadvantage where the two

trump spent the weekend discussing his options and will announce his pick at 9 p . m . monday from the white house .

male black - tailed jackrabbit reach sexual maturity at about 7 months of age . females usually breed in the spring of their second year , although females born in spring or early summer may breed in their first year . ovulation is induced by copulation . the breeding season is variable depending upon latitude and environmental factors . in the northern part of its range in idaho , black - tailed jackrabbit breeds from february through may . in utah , black - tailed jackrabbit breed from january through july , with over 75 % of females pregnant by april . the kansas breeding season extends from january to august . breeding in warm climates continues nearly year - round . two peak breeding seasons corresponding to rainfall patterns and growth of young vegetation occur in california , arizona , and new mexico . in arizona , for example , breeding peaks during winter ( january–march ) rains and again during june monsoons .

white - tailed jackrabbits are found throughout west - central canada and the united states with an elevation span of 40 to 4 , 300 m . they range from the great plains of saskatchewan and alberta east to extreme southwest ontario down into wisconsin and across the continent to the rocky mountains with a southern limit in central california ( wilson and ruff , 1999 ) . there has been a noted range reduction from the south east over the past half - century , notably in kansas , due to habitat alteration from increased agriculture and competition from the sympatric black - tailed jackrabbit (

white - tailed jackrabbits have a number of other distinct morphological characters which reflect adaptation to their environment and ecology . enormous ears equipped with generous blood flow are used for heat dissipation in the warmer portions of the range , while they also provide an excellent means of predator detection .

there is little current information regarding population status in california , but evidence polnts to a serious decline . overgrazing by livestock has been cited as a principal factor ( dalquest 1948 ) , as wel ! as cultivation and other development . may now be absent from large portions of its previous range , as in lasser co . where the last records are 20 yr old . california species of special concern ( williams 1986 ) . also called white - tailed jackrabbit .

due to the creation of suitable habitats for this species , it has been extending its range eastwards and northwards . yet its range has been reduced in the southeast due to the changes in habitat which have left the area more suitable for the sympatric lepus californicus - black - tailed jackrabbit . ( b430 . w2 )

reproduction : the white - tailed jackrabbit’s breeding season extends from february to july with a peak from march to june . gestation typically lasts 42 days . their litter size ranges from 1 to 11 , but averages at 4 - 5 . females may have one to four litters per year , however a maximum of one litter is produced in northern climates . the young are fully weaned at one month , and sexually mature after 7 - 8 months . [ 2 ]

three to five males may pursue one female concurrently during mating season , leading to aggresive charging among them . the courting behaviour of white - tailed jackrabbits consists of a series of aggresive charges and jumps . circling between male and female lasts from 5 - 20 minutes and is followed by copulation .

in summer , the coat is a grizzled brownish grey . in winter , the coat changes to pure white , except for black - tipped ears .

during the day , a white - tailed jackrabbit rests in a “form , ” a shallow pit in the earth under grass clumps or shrubs . it hides there all day , ears flat on its back . jackrabbits begin foraging in the low light of evening , hopping across open areas or following trails made by other jackrabbits through sagebrush . foraging continues all night , especially when the moon is out . in early morning jackrabbits return to resting forms to wait out the day .

white - tailed jackrabbits may be hunted , but not trapped , without a licence throughout the province , at all times of the year . see details in the alberta guide to hunting regulations . to view the guide online or to order a printed copy , visit the my wild alberta website at :

varies with season and habitat . the upper parts range from yellowish to grayish brown in colour , with white or grey on the underside . the throat and face are somewhat darker with coarser hair . in the northern extent of the range where there is significant snow fall during the year , a pure white colouration is attained with the possibilty of a buffy tint on the face , ears , feet and back . a slight change may be noted in the more southern range where only the sides of the animal become white while the back retains a more buffy - grey tinge . an early to late spring moult reverses this process . as the common name indicates , the tail is always white which may possess a buffy dorsal stripe . ears of this jackrabbit are rimmed in white and tipped in black year round . the juvenile pelage is similar but paler in colour with more under fur and less developed course guard hairs ( kim , 1987 ) .

contrary to their name , the black - tailed rabbits are actually hares , and only their tails are colored black . black - tailed rabbits are the most plentiful , while being the only hares found in desert habitats . what separates hares from rabbits are factors such as the body , ears , legs , and their young . the bodies of hares tend to be leaner , and they have longers ears and legs as well . while rabbits build nests , hares do not , and their young are born well - furred with wide open eyes . black - tailed rabbits are the plentiful , while being the only jackrabbit found in desert habitats .

the jackrabbit ' s breeding prowess is well known . females can give birth to several litters a year , each with one to six young . the young mature quickly and require little maternal care .

in arid regions , white - tailed jackrabbits excrete a nearly dry feces as a means of water conservation ( chapman et al . , 1982 ) . heat is dissipated through large ears and voluntary hyperthermia has been observed with the internal body temperature rising to over 41°c at the hottest point in the day ( forsyth , 1999 ) .

while we’re hunting late - season pheasants , my dog often flushes what at first look like small , white deer . the creatures burst from sagebrush or brushy ravines and race across the landscape . as a pup , simon tried to catch them , but after a dozen failed attempts he gave up and now runs half - heartedly for only a few hundred yards . the white - tailed jackrabbits , which can outrun any dog except a greyhound , slow down too , bounding along just ahead of him .

brownish - gray in summer and white in winter , the jackrabbit lives in open areas and seldom is found near wooded windbreaks , except in the most severe winter weather . it is a prairie hare which is more abundant in wide open grasslands of the west . although both were once numerous , grasslands and jackrabbits have given way to intensive farming in minnesota ' s western counties .

sometimes in the southern regions the sides of the body and rump may go white while the back becomes pale buffy - grey in winter . ( j469 . 288 . w1 )

even minus the bags , edmonton’s white - tailed jackrabbit population has escalated in the decades since , growing from less than 500 to nearly 3 , 000 before settling at about 2 , 600 . urban gardens and greenspaces provide ample food in an environment largely free of predators , dr . wood notes . “they do breed like bunnies . so just lower the predation rate slightly and the population will grow . ” in fact , the classic “prairie cycle , ” in which populations of small mammals expand and then contract as predator numbers rise , no longer seems to apply .

booming jackrabbit populations can cause problems for farmers , especially in light of the animals ' healthy appetite . jackrabbits are often killed for crop protection , but in general their populations are stable and not in need of protection .

the black - tailed jackrabbit is illustrated on the wave’s mosaic tile mural , rios de la vida ( rivers of life ) . the fountain , mural , and accompanying graphics illustrate the story of our los angeles and san gabriel rivers . although not on exhibit in the aquarium , this land mammal is included in our website animal database to expand on the information touched on in the wave fountain exhibit .

( dark buff peppered with black ) , and its undersides and the insides of its legs are creamy white . the ears are black - tipped on the outer surface , and unpigmented inside . the

instead , white - tailed jackrabbits ( or lepus townsendii ) are grassland species that have migrated to urban centres as their prairie habitat shrinks . adding to the potential for confusion , they are hares , not rabbits . adults live in above - ground depressions or “forms” rather than in burrows , and the young ( or leveret ) are born eyes - open and fully furred . who knew ?

likely prey for coyotes , bobcats , and larger raptors . the black - tailed hare is a more opportunistic feeder and has been displacing l . townsendii , particularly in areas altered by humans .

) are also imporant parts the diet ( kim , 1987 and chapman et al . , 1982 ) . this species has been known to winter in barns and feed extensively on the hay found inside ( banfield , 1974 ) . white - tailed jackrabbits are generally voracious eaters and captive specimens have been known to eat as much as . 5 kg of plant matter daily ( kim , 1987 ) .

behaviour the black - tailed jack rabbit does not migrate or hibernate during winter and uses the same habitat of 0 . 4 to 1 . 2 square miles ( 1 to 3 square km ) year round . the black - tailed jackrabbit can run at speeds of up to 30 miles an hour and it can jump a distance of about 20 feet . when it is trying to evade predators like coyotes , foxes , bobcats , badgers and weasels , it moves in a zig - zag pattern . it flashes the white underside of its tail when threatened by a predator . this warns other jackrabbits or danger and can also confuse the predator . it can also swim by dog - paddling with all four of its feet . it is most active at night . it usually spends the day resting in a scraped out hollow in the shade .

mammal . the white - tailed jackrabbit is actually a hare , not a rabbit . baby jackrabbits can run immediately after being born . adults can leap 3 meters ( 10 feet ) at a time at speeds of 64 kilometers ( 40 miles ) per hour . jackrabbits are nocturnal , feeding mainly from sunset to sunrise . during the day , they hide in shallow depressions called “forms” that may be covered with plants . in winter , jackrabbits may burrow in snowbanks , or lie in depressions with only their eyes , flattened ears , and backs visible above the snow . jackrabbits are strong swimmers . if cornered , they will dog - paddle with all four feet .

the gestation period ranges from 41 to 47 days . more litters are born in warm climates : the number of litters born each year ranges from two per year in idaho to seven in arizona . litter sizes are largest in the northern portions of black - tailed jackrabbit ' s range and decrease toward the south . average litter size has been reported at 4 . 9 in idaho , 3 . 8 in utah , and 2 . 2 in arizona .

like most mammals , white - tailed jackrabbits are nocturnal , feeding mainly from sunset to sunrise . during the day they rest in shallow forms which are dug into the earth 10 - 20 cm in depth and are usually under some form of plant cover . elaborate and well travelled trails may be observed that connect forms between often visited feeding sites . in winter snow , forms are replaced by cave - like structures joined with many connecting tunnels .

black - tailed jackrabbits are a common hare that inhabit american deserts , scrublands , and other open spaces , including farms . they can consume very large quantities of grasses and plants—including desert species such as sagebrush and cacti .

though large groups of white - tailed jackrabbits have been observed during extreme winter cold or in areas of abundant food , they are the least social of all hares ( kim , 1987 ) . only during the breeding season do small groups of 3 to 4 individuals form for courting behaviours . nests are built by females and lined with fur . though they are similar in shape to forms , nests are usually under dense cover . ( kim , 1987 ) .

populations of black - tailed jackrabbits undergo drastic fluctuations with numbers peaking every six to ten years . in some years more than 90 percent of western populations die from tularemia , which may or may not be related to the population changes .

surface of the tail is grey to white , and the black dorsal surface of the tail continues up the spine for a few inches to form a short , black stripe . the females are larger than males , with no other significant differences .

black - tailed jackrabbits are not listed as threatened or endangered . habitat availability is threatened to some extent by development and in some areas populations are dwindling . their large numbers in orchards , agricultural fields , and rangelands can do considerable damage and ranchers and farmers often need to cull the populations . populations of black - tailed jackrabbits undergo drastic fluctuations with numbers peaking every six to ten years . in some years more than 90 percent of western populations die from tularemia , which may or may not be related to the population changes .

" in the northern of mountainous parts of its range , there is a winter molt to a thick white pelage with tinges of buff . in southern localities or at lower elevations , there may be no color change or only a partial change . " ( b430 . w2 )

that are no more than a few centimeters deep . females may line forms with hair prior to giving birth , but some drop litters in existing depressions on the ground with no further preparation . young are borne fully furred with eyes open , and are mobile within minutes of birth . females do not protect or even stay with the young except during nursing . ages of weaning and dispersal are unclear since the young are well camouflaged and rarely observed in the field . captive black - tailed jackrabbit are fully weaned by 8 weeks . the young stay together for at least a week after leaving the form .

traffic is the major hazard for the urban hare , who can sprint as fast as 70 km an hour . for the tiny leveret awaiting their mother’s brief appearances to nurse , birds post the greatest danger . dr . wood has filmed an adult jackrabbit in a lifeand - death chase to save her baby from a diving owl .

in most areas of its range , this species turns completely white in the winter , though the ear tips remain black . however , on the plains of british columbia , kansas , nebraska and some regions of colorado , the winter coats are only slightly paler than their summer coats . (

jackrabbits are technically hares , not rabbits , though both look similar and belong to the same family , leporidae . hares are generally larger and faster than rabbits and have longer ears and feet . in addition , hares are solitary animals ( except during breeding season ) , while rabbits live in social groups . another difference is that rabbits are born blind , hairless , and helpless , while newborn hares have hair , can see , and are able to move about . both rabbits and hares have short tails and breed prolifically . white - tailed jackrabbits bear up to four litters of four or five young each year .

the breeding season of white - tailed jackrabbits lasts from february to july with a peak from march to june . ovulation is induced , requiring copulation or suitable stimulation . ( chapman et al . , 1982 ) . one to four litters with from 1 to 11 ( averaging 4 to 5 ) young are born each year . a maximum of one litter is produced in more nothern climates . the gestation period is commonly reported as 42 days but this length varies , possibly due to altitude and habitat ( kim , 1987 ) . this species exhibits breeding synchrony with male spermatogenesis and a postpartum estrus that facilitates conception soon after birth of young ( kim , 1987 ) .

jackrabbits are actually hares , not rabbits . hares are larger than rabbits , and they typically have taller hind legs and longer ears . jackrabbits were named for their ears , which initially caused some people to refer to them as “jackass rabbits . ” the writer mark twain brought this name to fame by using it in his book of western adventure , roughing it . the name was later shortened to jackrabbit .

the preferred habitats of black - tailed jackrabbits are valleys and flat , open country such as desert brushlands , meadows , prairies , farmlands , and dunes . they like the areas to be dry and with short grass . they use many different types of vegetation and are often found in agricultural areas where they can impact fruit and grain crops . jackrabbits often inhabit pastures that have been grazed by livestock .

black - tailed jackrabbits spend most of their day resting in shallow , body - sized depressions that they scratch in the ground at the base of shrubs or clumps of shaded tall grass to get protection from the summer’s hot sun and winter’s chilling winds . they maintain trails between their resting and feeding areas . although usually most active from dusk to late in the night , no matter the time of day , they always seem to be on guard and alert for potential predators in the area . remaining still , they may move their ears to catch sounds . attacked by a predator , they defend themselves by kicking with their hind feet , biting , and shrieking loudly . they alert other jackrabbits in the area to potential danger by flashing the white underside of their tail and thumping their hind feet to give a danger signal .

black - tailed jackrabbits eat their own droppings to obtain the vitamins and fatty acids necessary to their well - being . unlike most other mammals , they produce two types of pellets , one of which , cecotropes , is re - digested . cecotropes are produced in a portion of the animal’s digestive track called the cecum and are eaten as they emerge from the anus . bacteria and fungi in the hare’s cecum are the source of the essential nutrients the jackrabbits cannot produce but need and acquire as a result of the second digestion .

the largest of the north american hare species , adult black - tailed jackrabbits have a total length of about 50 - 60 cm ( 20 - 24 in ) from nose to rear . the length of their tail is 6 - 9 cm ( 2 - 3 . 5 in ) , ears , 10 - 15 cm ( 3 . 9 - 5 . 9 in ) , and hind feet about 14 cm ( 5 . 5 in ) . they weigh 2 . 4 - 3 . 9 kg ( 5 . 2 - 8 . 6 lb ) . females are slightly larger than males .

jackrabbits are strict herbivores whose diet varies depending on the time of the year and their habitat . in summer months they eat cacti , sagebrush , mesquite , alfalfa , clover , other grasses , and herbaceous vegetation . in fall and winter when this food is not available , their staple diet is dried vegetation and the young bark of woody plants . they forage for food from dawn and through the night , consuming large quantities relative to their size . . black - tailed jackrabbits do not require much water and obtain nearly all they need from the plant material they consume . those living in the desert obtain most of their moisture from water - retaining plants such as cacti .

first , and resorting to shrubs during the winter months . they are among the most solitary of hares and usually interact only briefly during the breeding season , when small groups may be seen . a female may produce 1 - 4 litters , usually of 4 or 5 young , each year .

bachman , j . , 1839 . additional remarks on the genus lepus , with corrections of a former paper , and descriptions of other species of quadrupeds found in north america , p . 90 . journal of the academy of natural sciences of philadelphia , 8 : 75 - 105 .

mammal species of the world ( opens in a new window ) . mammalian species , american society of mammalogists ' species account ( opens in a new window ) .

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this information is awaiting authentication by a species expert , and will be updated as soon as possible . if you are able to help please contact : arkive @ urltoken

gestation the state of being pregnant ; the period from conception to birth . montane of mountains , or growing in mountains . tundra treeless , grassy plains characteristic of arctic and sub - arctic regions . they are very cold and have little rainfall .

whitaker jr , j . o . and hamilton jr , w . j . ( 1998 ) mammals of the eastern united states . cornell university press , ithaca .

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this species is found in wisconsin ' s northwoods and has been profiled with the support of a wisconsin - based family who care deeply about the area . to learn more visit our eco - region pages .

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relationships between this order and rodentia have been disputed for over a century . its early history was discussed by simpson ( 1945 ) , while landry ( 1999 ) provided an overview of more recent literature on the subject , discussing many synapomorphies , mostly morphological , that support the concept of a cohort glires including both orders . molecular sequence data also support the concept ( huchon et al . , 1999 ) .

) . an accompanying range increase to the north has been observed over time ( kim , 1987 ) .

have large hind legs which facilitate high jumps and quick escapes from predators ( forsyth , 1999 ) . the dental formula is 2 / 1 0 / 0 3 / 2 3 / 3 = 28 with huge upper insicors for nipping plants ( chapman et al . , 1982 )

though females are slightly larger in size , there is no other apparent sexual dimorphism ( kim , 1987 ) .

at birth the young weigh approximately 90 - 100 grams , have open eyes , full fur , and limited mobility within half an hour . the young begin to forage at approximately 2 weeks of age and are fulled weaned at one month . sexually maturity is reached by 7 or 8 months though there is little evidence of reproduction until the spring following their birth .

( chapman , et al . , 1982 ; lim , 1987 ; wilson and ruff , 1999 )

breeding interval from 1 to 4 litters are born each year , depending on environmental conditions .

nurse and care for their young for about 1 month . females often create nests for the protection of their young from dried grass , leaves , and hair . young are born fully furred and are capable of some level of mobility shortly after birth .

can run up to 55 km / hr and bound 5m into the air .

( chapman , et al . , 1982 ; forsyth , 1999 ; lim , 1987 )

are poorly studied but believed to be approximately 2 to 3 km in diameter never straying far from forms and known trails .

these animals generally make no vocalizations , but will scream if caught or injured ( banfield , 1974 ) . they are likely to rely extensively on their acute hearing and sense of smell to perceive their environment , but also have good vision and whiskers that help them in navigating and finding food . like most mammals , they probably also rely extensively on chemical cues for communicating reproductive condition .

is a favorite prey item of animals such as red fox , grey fox , coyote , bobcat , cougar , badger , snakes , owls , eagles , and many species of hawks . the general method of predator avoidance is to lie perfectly still in the form , relying on their cryptic coloration to avoid detection , with large ears pointed slightly up for predator detection . jackrabbits may attempt to slink off silently but will bound away with surprising speed and height when surprised . zig - zag patterns as well as proficient swimming have been observed in predator escapes .

is considered a mammal of special concern in california , where populations have declined dramatically , probably as a result of competition with livestock and overgrazing by livestock .

is slightly larger and some subtle pelage variation is observed ( kim , 1987 ) .

acquired its name from j . k . townsend , who collected the type specimen ( kim , 1987 ) .

living in the nearctic biogeographic province , the northern part of the new world . this includes greenland , the canadian arctic islands , and all of the north american as far south as the highlands of central mexico .

having body symmetry such that the animal can be divided in one plane into two mirror - image halves . animals with bilateral symmetry have dorsal and ventral sides , as well as anterior and posterior ends . synapomorphy of the bilateria .

having markings , coloration , shapes , or other features that cause an animal to be camouflaged in its natural environment ; being difficult to see or otherwise detect .

in deserts low ( less than 30 cm per year ) and unpredictable rainfall results in landscapes dominated by plants and animals adapted to aridity . vegetation is typically sparse , though spectacular blooms may occur following rain . deserts can be cold or warm and daily temperates typically fluctuate . in dune areas vegetation is also sparse and conditions are dry . this is because sand does not hold water well so little is available to plants . in dunes near seas and oceans this is compounded by the influence of salt in the air and soil . salt limits the ability of plants to take up water through their roots .

animals that use metabolically generated heat to regulate body temperature independently of ambient temperature . endothermy is a synapomorphy of the mammalia , although it may have arisen in a ( now extinct ) synapsid ancestor ; the fossil record does not distinguish these possibilities . convergent in birds .

forest biomes are dominated by trees , otherwise forest biomes can vary widely in amount of precipitation and seasonality .

offspring are produced in more than one group ( litters , clutches , etc . ) and across multiple seasons ( or other periods hospitable to reproduction ) . iteroparous animals must , by definition , survive over multiple seasons ( or periodic condition changes ) .

this terrestrial biome includes summits of high mountains , either without vegetation or covered by low , tundra - like vegetation .

the area in which the animal is naturally found , the region in which it is endemic .

the kind of polygamy in which a female pairs with several males , each of which also pairs with several different females .

that region of the earth between 23 . 5 degrees north and 60 degrees north ( between the tropic of cancer and the arctic circle ) and between 23 . 5 degrees south and 60 degrees south ( between the tropic of capricorn and the antarctic circle ) .

a terrestrial biome . savannas are grasslands with scattered individual trees that do not form a closed canopy . extensive savannas are found in parts of subtropical and tropical africa and south america , and in australia .

a grassland with scattered trees or scattered clumps of trees , a type of community intermediate between grassland and forest . see also tropical savanna and grassland biome .

a terrestrial biome found in temperate latitudes ( > 23 . 5° n or s latitude ) . vegetation is made up mostly of grasses , the height and species diversity of which depend largely on the amount of moisture available . fire and grazing are important in the long - term maintenance of grasslands .

reproduction in which fertilization and development take place within the female body and the developing embryo derives nourishment from the female .

american society of mammalogists , 2009 . " mammals of california " ( on - line ) . american society of mammalogists , state lists . accessed july 27 , 2009 at urltoken .

chapman , j . , j . dunn , r . marsh . 1982 . lepus townsendii . pp . 124 - 137 in j chapman , g feldhamer , eds .

to cite this page : gosline , a . 2001 . " lepus townsendii " ( on - line ) , animal diversity web . accessed july 09 , 2018 at urltoken

disclaimer : the animal diversity web is an educational resource written largely by and for college students . adw doesn ' t cover all species in the world , nor does it include all the latest scientific information about organisms we describe . though we edit our accounts for accuracy , we cannot guarantee all information in those accounts . while adw staff and contributors provide references to books and websites that we believe are reputable , we cannot necessarily endorse the contents of references beyond our control .


it is found in south-eastern china ( fujian ) .

the wingspan is about 17 mm .

eupithecia luctuosa

eupithecia luctuosa <EOT> eupithecia luctuosa is a moth in the geometridae family . it is found in south - eastern china ( fujian ) .

ash pug ( angle - barred pug ) ( eupithecia innotata f . fraxinata )

vespa luctuosa is a species of hornet which is endemic to the philippines . the main subspecies is " vespa luctuosa luctuosa " ( primarily native to luzon island ) . other known subspecies include " vespa luctuosa luzonensis " ( primarily native to the visayas , including leyte island and samar island ) and " vespa luctuosa negrosensis " ( native to negros island ) . " vespa luctuosa " is best known for its potent venom .

the species name refers to the colouration of the species and is derived from latin " luctuosa " ( meaning sad ) .

episcepsis luctuosa is a moth of the family erebidae . it was described by möschler in 1877 . it is found in venezuela , surinam and northern brazil .

quatiara luctuosa is a species of beetle in the family cerambycidae , and the only species in the genus quatiara . it was described by leséleuc in 1844 .

nyctemera luctuosa is a moth of the family erebidae . it is found in papua new guinea , australia and the philippines . the habitat consists of mountainous areas .

a taxon identifier is composed of name , author , year and attribute , all separated by a blank . these are all extracted from the original publication .

the name is reproduced exactly as proposed in the original publication . the name of a genus is made up of one word and species made up of two words ( genus and species ) separated by a blank .

the author ' s name is made up of a string of letters , with no blanks , and multiple authors ' names are separated by a comma . spelling of author ' s name is based on the original publication . if there are more than three authors , only the names of the first two authors are shown , followed by " , + " and the number of omitted authors .

attribute is enclosed in square brackets . this is rarely needed , but to differentiate homo - identifiers , this will contain the page , line or plate number of original publication .

all diacritic marks , hyphens , and apostrophes are eliminated , thus only the following characters are used : a to z , a to z , 0 to 9 , blank , comma , and opening and closing square brackets . although upper and lower cases are used for the convenience of human recognition , it is not case sensitive .

created by dicky sick ki yu 1997 - 2012 please send me information about errors and omissions ( contact information ) with supporting references , possibly with pdf or hard copy .

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to date 683 species of macro - moth along with 1159 species of micro - moth have been recorded in norfolk since records began in victorian times . this site aims to provide full details of all the species that occur ( or once occurred ) in norfolk , with photographs , descriptions , flight graphs , latest records , distribution maps and more !

if you have photos of any moths featured on this site , and would like them displayed along with your name and comments . . . please send them in ( any size . jpg images ) .

please consider helping with the running costs of norfolk moths . thank you : - )

underlying maps using digital map data © norfolk online lepidoptera archive - nola™ 2018 . © james wheeler - n o r f o l k m o t h s 2007 - 2018 . data © nola™ 2018

the wingspan is about 17 mm . the fore - and hindwings are mid brown .

it is reddish to chocolate brown , bordered by a narrow cream dorsolateral line on each side , beginning at the tip of the snout to above the vent .

the height of the shell attains 35 mm , its diameter 44 mm . the solid , heavy shell is depressed , broadly umbilicate , and has a conoidal shape . it is black or purplish . the spire is more or less depressed . the sutures are linear . the shell contains 5 to 6 whorls . the upper ones have a strong carina midway between the sutures . the body whorl is carinated at the periphery and above , generally showing a less prominent carina on the base near the periphery . the aperture is oblique . the arcuate columella is oblique . the umbilicus is broad and deep , with a spiral rib within . this species is characterized by its wide umbilicus and strongly keeled whorls .

the forewings are black with a broad irregular diagonal white band and a small white spot near the base . the hindwings are white with broad black margins . adults are variable in both pattern and ground colour . this is a day - flying species .

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for the county , we have a total of 203 records from 104 sites . first recorded in 1940 .

: a very local species in yorkshire but now recorded from all five vice - counties . it is widely distributed in spruce plantations all over northumberland and durham and still increasing its range ( dunn & parrack , 1986 ) , so it may well also turn out to be more widespread in yorkshire .

: locally common in spruce plantations but not often wandering to other areas . distinctive when fresh .