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The Great Black-backed Gull is the largest gull in the world. Primarily a bird of the Atlantic Coast, seldom seen inland except around the Great Lakes. Because of its large size and omnivorous feeding habits, the Great Black-backed Gull can be a significant predator on other species of birds during the nesting season. It has benefitted from certain human activities (such as the establishment of garbage dumps) and has expanded its range southward along the Atlantic seaboard in recent decades.