Introduction to East Dongting Lake: East Dongting Lake is the largest lake in the Dongting Lake system and one of the 200 biodiversity hotspots in the world. A total of 338 species of birds have been monitored and recorded over the years. Among them, 7 species are under national first-level protection: white crane, bald crane, white stork, black stork, great bustard, Chinese merganser, and white-tailed sea eagle. Second-level protection include There are 47 species of cygnets, mandarin ducks, white-naped cranes, gray cranes, and white-fronted geese; 117 species of freshwater fish; freshwater mammals include the Baiji dolphin, a national first-level protected species, and the finless porpoise, a second-level protected species; and 68 species of other aquatic animals.