Conservation status : CRITICALLY ENDANGEREDCommon name : Celebes crested macaque , Crested black macaqueScientific name : Macaca nigraType : MammalDiet : Fruits , leaves , buds , seeds , fungus , birds and bird eggs , insects , small lizards or frogsLength : 44 cm - 60 cm ( Adult ) Weight : 5 . 5 kg ( Adult : Female ) , 2 . 5 kg ( Adult : Male ) The Celebes crested macaque , often simply referred to as the " black macaque ", is an Old word monkey that resides in the northeastern tip of the Indonesian island of Sulawesi ( Celebes ) and other small neighboring islands . But you might be more familiar with these monkeys for the copyright issues that they were involved in . These critically endangered monkeys cover their entire body with jet - black fur except for their hairless face and the shoulder range , where some white hair can be found . Unlike other primates , it has striking reddish - brown eyes . The long muzzle with high cheeks and the long hair tuft , or crest , at the top of the head , are also remarkable features . They are also considered to have an " apelike " appearance due to its almost non - existent , non - visible , vestigial tail stub that is approximately 2 cm long . This diurnal , rain - forest - dwelling macaque is primarily terrestrial and spends more than 60 % of its day on the ground foraging for food and socializing while sleeping and searching for food in the trees . These creatures , however , are still being slaughtered as they are considered to be agricultural pests . Likewise , habitat loss poses another major threat to the monkeys ' survival . References : " Macaca Nigra ( Black Crested Macaque , Celebes Black Macaque , Celebes Crested Macaque , Celebes Macaque , Crested Black Macaque , Gorontalo Macaque , Sulawesi Black Macaque , Sulawesi Macaque ) ". Iucnredlist . Org , http : / / www . iucnredlist . org / details / 12556 / 0 . " Photographer ' lost £ 10 , 000 ' in Wikipedia monkey ' selfie ' row ". BBC News . August 7 , 2014 . Retrieved August 7 , 2014 .