The Caspian Tern is whitish-gray with a black cap and a large reddish bill with a touch of black tip, black legs, and blacker under the primaries. It is one of the larger terns as compared with the Common Tern. Size is compared to a Herring Gull. They have a range around the world, and breed and winter around the coastlines, and inland along lakes, rivers, and marshes. They have a habitat of large lakes, coastal waters, beaches, and bays. They feed on small fish, marine life, and large insects. It rarely swims and plunges from high to catch fish under the water surface. They usually nest in large densely packed colonies, but are not sociable. They are highly vocal.