Blue Bull, the other name of the Nilgai is one of the most commonly found wild animals in Gir National Park. Although it is an antelope it looks more or less like an ox. The Indian Blue Bull antelope grows to a length for 1.8 to 2 meters; it weighs nearly one hundred twenty to two hundred and forty kilograms. On the top of the long and narrow head a nilgai has two conical horns. The horns are straight and slightly tilted.