Albinism in Blackbuck is rare and caused by the lack of the pigment melanin. The distinctive horns of the Blackbuck are ringed with 1 to 4 spiral turns, rarely more than 4 turns, and can be as long as 79 cm (31 in).In the male, the upper body is black (dark brown), and the belly and eye rings are white. The light-brown female is usually hornless. The blackbuck (Antilope cervicapra) is an antelope species native to the Indian Subcontinent that has been classified as endangered by IUCN since 2003