海鸥（鸟类）小科普：

海鸥（学名：Larus canus）是一种中等体型的鸥。 Body length 38-44 centimeters, wingspan 106-125 centimeters, weight 300-500 grams, life span 24 years. [1] It has greenish-yellow legs and unspotted ringed beak, white tail, white tips of primary flight feathers, and large white wing mirrors. In winter the head and neck are streaked with fine brown lines, sometimes with black at the tip of the beak. Seagull body posture is beautiful, love, the lower part of its body feathers are as crystal white as snow.

The gull is a migratory bird, distributed in Europe, Asia to Alaska and western North America. It is seen in the northeastern provinces of China during migration. It winters along the entire coast, including Hainan Island and Taiwan, and is also found in most inland lakes and rivers in eastern and southern China.

There are two explanations for gulls: the broader gull is a general term for more than 40 species of seabirds in the family Gullidae; and the narrower gull is a species in the family Gullidae, the genus Gull.