The seagull (scientific name: Larus canus) is a medium-sized gull. The body length is 38-44 cm, the wingspan is 106-125 cm, the weight is 300-500 grams, and the life span is 24 years. Legs and thin beak without spots green-yellow, white tail, white tips of primary flight feathers, with large white wing mirrors. In winter, fine brown lines are scattered on the head and neck, and sometimes the tip of the mouth is black. Seagulls are well-built and lovable, and the feathers on the undersides of their bodies are as crystal white as snow.