Gull, a web-footed, long-winged bird found both on oceans and inland waters. It is closely related to the tern. A gull is from 13 to 28 inches (33 to 71 cm) long. The bill is heavy and slightly hooked, and the tail is squarish. A gull usually has whitish underparts, with gray back and upper-wing surfaces. In some species, the head is black and the wings are black-tipped. Any gull found near sea water is called a sea gull.Gulls are aquatic scavengers with white-gray feathers.
Gulls are expert fliers and graceful soarers. They feed on the surface of the water, keeping harbors free of refuse and following ships to pick up bits of food. When weary, gulls tuck their heads under their wings and sleep on the waves. Gulls often venture inland in search of insects.
Gulls nest in colonies on ground, cliffs, or beaches, but seldom in trees. The female lays two to four spotted brown, blue, or green eggs in a nest of seaweed or vegetation, lined with moss and feathers.
The black-legged kittiwake ranges from the Canadian Arctic south to New Jersey. Largest of the gulls is the 28-inch (71-cm) glaucous gull, or burgomaster, rarely seen south of the Great Lakes. Other common gulls are the Franklin's gull, herring gull, the laughing gull, and the ring-billed gull.
The California gull is L. californicus; Franklin's gull, L. pipixcan; glaucous gull, Larus hyperboreus; herring gull, L. argentatus; kittiwake, Rissa tridactyla; laughing gull, L. atricilla; ring-billed gull, L. delawarensis. Gulls belong to the family Laridae.Gulls are expert fliers and graceful soarers.