A common seagull (Larus argentatus) of the Northern Hemisphere having gray and white plumage with black wing tips. Most common of the Atlantic gulls in the Northern Hemisphere. The herring gull (Larus argentatus) has a gray mantle, flesh-coloured legs and feet, and black-and-white-spotted wing tips. Herring gulls are primarily scavengers; their populations are generally increasing because of expanding food supplies, chiefly garbage and sewage in or near coastal waters