The White Bengal Tiger is variant of the bengal tiger species, instead of an orange coat with black stripes, it has a white coat with black stripes, and has blue irises. It is not albino however, as it still has stripes, and the eyes aren't red. Compared to normal-coloured tigers, white tigers tend to be larger- both at birth and as fully grown adults. Kailash Sankhala, the director of the New Delhi Zoo in the 1960s, said "one of the functions of the white gene may have been to keep a size gene in the population, in case it's ever needed."