The drab black shag is provided by nature, curing breeding, a white mark on the cheek to look handsome for the occasion. The spoonbill is by far the most beautiful and conspicuous. The heronry extends to a small part of the park, where each tree is crowded with 80 to 100 nests. To a layman, it might seem strange that so many birds of so many species breed in such a small area of the park. The fact is that it is not the lack of suitable are in the park which results in crowding but these birds find security in number.
Keoladeo heronry is full of life, action and activity.
Besides the avian fauna, many species of mammals and reptiles are also common in the park. Bluebull and sambar feed on hydrophytes at the lake. Black buck and spotted deer herds graze in the extensive grasslands. Wild boar and jackal roam around in the scru bland. Fishing cat frequents the lakes to scoop away fish or steel a duck.