Introduction to seagulls:

Seagull (scientific name: Laruscanus): It is a medium-sized bird-winged order and hilly seabird. Weight 394-586 grams; The body length is 451-510mm, and the life span is 24 years. Adult bird Stephane: the head and neck are white, and the back and shoulders are gray slates; The feathers on the wings are also slate gray, the same color as the back; The waist and tail feathers are all pure white. The primary flying feather has a white tip and a white wing mirror.

The upper body of young birds is generally white with light brown striped spots; The tail is covered with white feathers with brown transverse spots, with grayish brown tail and white base; The primary flight feathers are dark brown, the other flight feathers are brown, and the edges are pale white. The tail feathers of sub-adult birds are white with broad black secondary spots, and the secondary and tertiary flight feathers are light gray with brown spots. In winter, the head and neck are scattered with brown fine lines, and sometimes the corners of the mouth are black.

In winter, the head and neck are scattered with brown fine lines, and sometimes the corners of the mouth are black. Iris yellow; The mouth, feet and toes are light green and yellow. Seagulls are migratory birds. The breeding season mainly inhabits rivers, lakes, ponds and swamps in Arctic tundra, forest tundra, desert and grassland, and mainly inhabits coasts, estuaries and harbors in winter. Move in pairs or groups or fly in the air. At the seaside and seaport, groups float on the water, swimming and foraging.

Seagulls feed on small fish, insects, mollusks, crustaceans, worms and grubs in cultivated land. This species breeds in northern Europe, North Asia and northwest North America. Except for Iceland, populations near the North Sea and the Baltic Sea, and some seagulls along the coast of Canada, most seagulls migrate to the south.

April-August is the breeding season of seagulls every year. They nest in groups on the coast, islands, river banks or stone beaches. Usually it nests in inland freshwater or saltwater lakes and swamps, and also in coastal islands. In some places, the density of nests is high, and the distance between two nests is 1-2 meters. Each parent bird has delineated its own "sphere of influence" and no other birds are allowed to invade it.