» Blue bull redirects here. For the South African rugby union team, see Blue Bulls. The Nilgai (Boselaphus tragocamelus) is an antelope which is one of the most commonly seen wild animals of northern India and eastern Pakistan. The mature males appear ox-like and are also known as Blue bulls. The nilgai is the biggest asian antelope. Description Nilgai stand 1.2-1.5 meters (4-5 feet) at the shoulder and are 1.8-2 meters (6-6.6 feet) long. Their tails are 40-45 centimeters. Mature nilgai typica… (More on Nilgai)