Adult gulls are in winter plumage: similar to summer plumage except for light brown spots on top of the head, sides of the head, occiput, and nape, which are sometimes arranged in longitudinal stripes on the occiput and horizontal stripes on the nape.

Seagulls are the most common seabirds, in the seaside, harbor, in the abundance of fish and shrimp fishing, flocks of seagulls floating on the water surface, swimming, foraging for food, flying low, like to gather in groups in the sea where the food is plentiful. Seagulls in addition to fish, shrimp, crab, shellfish for food, but also love to pick food on board people abandoned the leftovers, so the seagulls have a "harbor cleaner" nickname.