Nilgai, also called bluebuck, large antelope that ranges in wooded areas of the Indian Subcontinent; the male is blue-grey and the female red-brown. Both sexes have a short mane and white markings on the belly and throat. The male bears short, curved horns and a tuft of black hair at the throat. Height: to 1.4m. Family Bovidae; species Boselaphus tragocamelus.