Black-necked crane introduction: Black-necked crane is a national grade I key protected wild animal. Huize Black-necked Crane Reserve is one of the main wintering places for black-necked cranes in China. Black-necked cranes usually winter here. As many as 500 or more. The overwintering habitats of black-necked cranes are mainly swamp wetlands and grasslands, of which swamp wetlands account for more than 60%, grasslands account for 20-38%, and farmland and shallow wetlands account for less than 10%.