Great Black-backed Gull

The world''s largest gull is massive, with a bulky frame and a prominent large bill. Adults sport dark black backs and pale pink legs, while nonbreeding adults display minimal head streaking. Immatures take four years to attain adult plumage, showcasing mottled intermediate stages. They typically appear colder-toned, featuring checkered upperparts and a whiter head compared to other immature gulls. Notable for their size and robust bills, they are commonly found along the northeastern U.S. and European coasts, as well as on expansive lakes like the Great Lakes. These gulls often congregate in mixed groups with other large species on beaches and mudflats.