Gulls or seagulls are seabirds of the family Laridae in the suborder Lari. They are most closely related to the terns (family Sternidae) and only distantly related to auks, skimmers, and more distantly to the waders. Seagulls are typically medium to large birds, usually grey or white, often with black markings on the head or wings. They typically have harsh wailing or squawking calls; stout, longish bills; and webbed feet. Gulls nest in large, densely packed, noisy colonies. Many gull colonies display mobbing behavior, attacking and harassing predators and other intruders. 4K UHD 3840×2160 30p.