Mew gulls can be quite opportunistic, which certainly contributes to their adeptness at survival and their great abundance. As an example, the Mew gull, when it is able to get a clam or muscle, will fly over and drop the creature repeatedly on a hard surface until the shell gives way and cracks open. However the Mew gulls food of choice is almost always fish or seafood, which it will catch by dipping down into the water, or simply floating above and waiting for the fish. Worms, insects, mice, berries and grains from farmlands also make up the wide spectrum of food gulls will consume. Many times when food is scarce, gulls will resort to cannibalism, eating a large number of hatchlings and younger birds, which in many gull colonies leads to a high infant mortality rate.
Foods eaten include: cod, herring, worms, insects, berries, grains, crustaceans, clams, mussels and young sea birds.
(Time Life, 1976; Bent, 1963; Harrison, 1983)
Animal Foods: birds; mammals; fish; eggs; carrion ; insects; mollusks; terrestrial worms; aquatic crustaceans
Plant Foods: seeds, grains, and nuts; fruit
Primary Diet: omnivore