text: <answer> Pied-billed grebe, least bittern, Interior Least Tern, Pelican, Blue-winged Teals and green herons are the types of water birds. <context> Water Birds Pictures. 1  Interior Least Tern - an adult interior least tern with a caught fish in its beak flies over, seen from left under clear blue sky. 2  Pelican 1 - a large California Brown Pelican in flight, seen from front and below. 3  Blue-winged Teals - two blue-winged teals swim in a deep blue pond, seen from right.