Chilla is the most popular zone of Rajaji national park and it is in this zone that I have been able to capture a number of raptors. However the Crested Serpent Eagle is quite occassionally seen compared to the other raptors. The Chilla range has diverse habitat which include Sal forests, grasslands, dry forests, riverine forests, teak plantatations, semi-arid Bhabhar, mixed-moist and semi-moist jungles and due to this it supports a large range of wildlife.