Bird introduction: Yanwo Island has an advantageous geographical location, suitable climate, low and flat terrain, and a large population of rare and endangered animals. It only has national protected birds: red-crowned crane, white-naped crane, white-tailed sea eagle, and gray crane. There are 89 species including whooper swans, mandarin ducks, and white-fronted geese. The mammals include national second-level protected animals: otters, muskrats, red foxes, raccoon dogs, Northeastern hares, roe deer, wild boars, etc., as well as rich fish resources such as silver carp, red-bellied crucian carp, carp, catfish, pike, etc., as well as species Extensive vegetation.