Their cry is a sharp bark, but that of the old males is very hoarse. One of their great enemies is the Lämmergeier or Bearded Vulture.
These observations have been extracted from the account given of this species by von Heuglin, who discovered it during his Abyssinian expedition in 1853.
THE MALAYAN BABOONS. GENUS CYNOPITHECUS.
Cynopithecus, Is. Geoffr., in Belanger's Voyage, p. 66 (1834).
This genus has been constituted to include the single species described below; the characters of the genus being thus, perforce, the same as those of the species.
THE CELEBEAN BLACK BABOON. CYNOPITHECUS NIGER.
Cynocephalus niger, Desm., Mamm., p. 534 (1820).
Macacus niger, Bennett, Gard, and Menag. Zool. Soc., p. 189, with figure (1830); Schl., Mus. Pays Bas, vii., p. 119 (1876).
Cynopithecus niger, Is. Geoffr., in Bélanger's Voyage, p. 66 (1834); Lesson, Quadrum., p. 101 (1840); Gray, Cat. Monkeys Brit. Mus., p. 33 (1870).
Papio niger et P. nigrescens, Temm., Possess. Néerl. Ind., iii., p. 111 (1847).