Ngokusekelwe endimeni enikeziwe, chaza isizathu esiyinhloko esenza ukuba isikhonyane saseRocky Mountain sife.
Context:Izinkumbi zaseRocky Mountain zabangela umonakalo emapulazini aseMaine kusukela ngo - 1743 kuya ku - 1756 naseVermont ngo - 1797 kuya ku - 1798. Izinkumbi zaba yinkinga nakakhulu ngekhulu le-19, njengoba ukulima kwakhula kuya ngasentshonalanga endaweni eyayithandwa yilezi zinambuzane. Kwaqubuka izifo ezazingafani ngobukhulu ngo-1828, 1838, 1846, nango-1855, ezithinta izindawo kulo lonke elaseNtshonalanga. Izinhlupho zavakashela iMinnesota ngo-1856<unk>1857 futhi futhi ngo-1865, kanti iNebraska yahlushwa izifo eziphindaphindiwe phakathi kuka-1856 no-1874.   Umdwebo ka-1875 kaHenry Worrall obonisa abalimi baseKansas belwa nezinkumbi ezinkulu Izinkumbi ezinkulu zokugcina zesikhonyane saseRocky Mountain zazingaphakathi kuka-1873 no-1877, lapho lesi sikhonyane sabangela umonakalo wezitshalo ongamaRandi ayizigidi ezingu-120 eColorado, eKansas, eMinnesota, eMissouri, eNebraska nakwezinye izifundazwe. Omunye umlimi wabika ukuthi isikhonyane sasibukeka "njengefu elikhulu elimhlophe, njengesivunguvungu seqhwa, sivala ilanga njengomusi". Izinkumbi zazingadli utshani nezitshalo eziyigugu kuphela, kodwa zazidla nesikhumba, ukhuni, uboya bezimvu, futhi - ezimweni ezimbi kakhulu - zaze zidla ngisho nezingubo zabantu. Ngezinye izikhathi izitimela zazimiswa ngemva kokweqa inani elikhulu lezinkumbi ezazigadle ezitimeleni. Njengoba lezi zixuku zaziba zimbi kakhulu, abalimi bazama ukuzilawula besebenzisa isibhamu, imililo (ngezinye izikhathi eyayigujwa emigodini ukuze bashise izinambuzane eziningi ngangokunokwenzeka), bezifafaza "ngama-hopperdozer", uhlobo lwedivayisi yokulima eyayidonswa ngemva kwamahhashi eyayinesivikelo esasishaya izinambuzane ezigxumayo zingene epanini elinobuthi noma uphethiloli, zize zizimunce zibe izinto ezifana ne-vacuum cleaner, kodwa ekugcineni konke lokhu akuzange kube usizo ekuvimbeleni lezi zixuku. UCharles Valentine Riley, isazi sezinambuzane eMissouri, wasungula iresiphi yezinambuzane ezihlotshiswe ngosawoti nopelepele futhi ezishiswe ngebhotela. Le ndlela yokupheka yathengiswa, kodwa abanye bathi "babengabulawa indlala ngokushesha nje lapho sebedlile lezo zidalwa ezesabekayo". Ekugcineni abalimi basabela ngokuqinile ekubhujisweni kwalesi sixuku; umthetho waseNebraska ka-1877 wawuthi noma ubani oneminyaka ephakathi kwengu-16 nengu-60 ubudala kwakumelwe asebenze okungenani izinsuku ezimbili eqeda izintethe ngesikhathi zizalela noma abhekane nenhlawulo ka-R19. Ngawo lowo nyaka uMissouri wanikeza umklomelo ka-$1 ibhulukhwe ngalinye lesikhonyane elaliqoqwa ngo-March, amasenti angu-50 ibhulukhwe ngalinye ngo-April, amasenti angu-25 ngo-May, namasenti angu-10 ngo-June. Ezinye izifundazwe zaseGreat Plains nazo zenza izicelo ezifanayo. Ngawo-1880 abalimi base bezolulama ngokwanele ezinkingeni zabo zezinkumbi ukuze bakwazi ukuthumela izimoto ezigcwele ummbila ezihlukunyezweni zezikhukhula eOhio. Baphinde bashintshela ezitshalweni ezinjengokolweni wasebusika, owawuvuthwa ekuqaleni kwehlobo, ngaphambi kokuba isikhonyane sikwazi ukuthutha. Le mikhuba emisha yezolimo yanciphisa usongo lwezinkumbi futhi yaba nomthelela omkhulu ekuqothulweni kwalezo zinhlobo.  Kuye kwacatshangwa ukuthi ukulima nokunisela okwenziwa abafuduki kanye nokunyathelwa izinkomo nezinye izilwane zasemapulazini eduze kwemifudlana nemifula esezintabeni zaseRocky kwabhubhisa amaqanda azo ezindaweni ezazihlala kuzo unomphela, okwagcina kubangele ukufa kwazo. Isibonelo, imibiko yalesi sikhathi isikisela ukuthi abalimi babulala amaqanda angaphezu kuka-150 nge-intshi yesikwele ngenkathi belima, belima noma bezikhukhula.: 11<unk>12 Kubonakala sengathi lezi zinhlobo zazihlala futhi zizalana emathafeni okwesikhashana kuphela phakathi neminyaka yokuxokozela, isizukulwane ngasinye sincane kunesandulele futhi sihlwanyela kude kakhulu nasezintabeni zaseRocky, kuyilapho izindawo zokuzalanisa ezihlala njalo zalezi zinhlobo zabonakala zikhawulelwe endaweni ethile ephakathi kwamamayela ayi-3 no-3,000 amakhilomitha-skwele omhlabathi onesihlabathi eduze kwemifudlana nemifula esezintabeni zaseRocky, okuhambisana nomhlaba olimekayo namadlelo asetshenziswa abahlali.  Ngenxa yokuthi isikhonyane siyindlela yesikhonyane esivela lapho inani lazo lifinyelela ubukhulu obukhulu, kwacatshangwa ukuthi i-M. spretus kungenzeka ingapheli, ukuthi "isigaba esizimele" sabantu besikhonyane esifudukayo kungenzeka sikwazi ukuphenduka isikhonyane seRocky Mountain uma kunikezwa izimo ezifanele zemvelo; kodwa-ke, ukuhlolwa kokuzalanisa kusetshenziswa izinhlobo eziningi zezikelemu ezindaweni ezinabantu abaningi kwehlulekile ukubiza isinambuzane esidumile. Isimo sikaM. spretus njengohlobo oluhlukile saqinisekiswa ngo-2004 ngokuhlaziywa kwe-DNA yezinhlobo zaseNyakatho Melika zohlobo lweMelanoplus.  I-Melanoplus spretus yamenyezelwa ngokusemthethweni ukuthi iphelile yi-IUCN ngo-2014. Kuye kwasikiselwa ukuthi i-Eskimo curlew manje esengozini enkulu yokushabalala idla isikhonyane ngesikhathi sokufuduka kwaso kwentwasahlobo nokuthi ukuqothulwa kwaso kungenzeka kwengeze ekucindezelweni kwezinombolo ze-curlew esezinciphile kakade kubandakanya ukuzingela nokuguqulwa kwendawo yokuhlala yamahlathi ayo ekulimeni.
Izinkumbi zaseRocky Mountain zaphela ngenxa yokuthi abalimi bendawo babelokhu benisela futhi belima indawo yazo, okwabhubhisa amaqanda azo okwaholela ekuqothulweni kwazo.