Wildlife Institute of India Dehradun, Uttarakhand

aquatic animals Night herons nest alone or in colonies, on platforms of sticks in a group of trees, or on the ground in protected locations such as islands or reedbeds. 3-8 eggs are laid.Night herons stand still at the water's edge, and wait to ambush prey, mainly at night. They primarily eat small fish, crustaceans, frogs, aquatic insects, and small mammals. During the day, they rest in trees or bushes.

The great crested grebe is the largest member of the grebe family found in the Old World, with some larger species residing in the Americas. It is an excellent swimmer and diver, and pursues its fish prey underwater. The adults are unmistakable in summer with head and neck decorations. In winter, this is whiter than most grebes, with white above the eye, and a pink bill. The young are distinctive because their heads are striped black and white. They lose these markings when they become adults.The Great crested grebe breeds in vegetated areas of freshwater lakes, found across Europe and Asia. It winters on freshwater lakes and reservoirs or the coast. The crested grebe feeds mainly on fish, but also small crustaceans, insects and small frogs.