Mew gull

The Mew gull (Larus canus) is a medium-sized gull belonging to the family Laridae. It is also known as the common gull, although this name can cause confusion as it is applied to different Larus species in different regions. The Mew gull is widely distributed across Eurasia and western North America.

Description

Mew gulls are typically around 40-46 cm long, with a wingspan of 110-125 cm. Adults have grey backs and upperwings, white underparts, and yellow legs. The bill is yellow-greenish and relatively short. The wingtips have black markings, which vary geographically. In winter plumage, the head and neck are lightly streaked with brown. Juvenile birds are mottled brown all over and take three to four years to reach full adult plumage.

Distribution and Habitat

Mew gulls breed across northern Eurasia, from Iceland and the British Isles eastwards through Scandinavia, Russia, and Siberia. In North America, they breed in Alaska and western Canada. Their breeding habitats vary but often include coastal areas, marshes, lakes, and rivers. Outside of the breeding season, they disperse more widely, often frequenting coastal areas, estuaries, and inland waters. Some populations are migratory, while others are resident.

Behavior and Diet

Mew gulls are opportunistic feeders, with a varied diet. They consume fish, crustaceans, mollusks, insects, earthworms, and berries. They will also scavenge for food in urban areas and agricultural fields. They are often seen foraging in flocks.

Reproduction

Mew gulls typically breed in colonies, but sometimes nest solitarily. The nest is a shallow depression on the ground, lined with vegetation. The female lays two to three eggs, which are incubated by both parents for about 24-26 days. The chicks fledge at around 35-40 days old.

Subspecies

Several subspecies of Larus canus are recognized, differing slightly in size, plumage, and bill colour. These include:

• Larus canus canus (European Common Gull)
• Larus canus heinei (Russian Common Gull)
• Larus canus kamtschatschensis (Kamchatka Gull)
• Larus canus brachyrhynchus (Short-billed Gull) - North America

Conservation Status

The Mew gull is generally considered to be a species of Least Concern by the International Union for Conservation of Nature (IUCN). However, some local populations may be facing threats from habitat loss, pollution, and human disturbance.