Swan Goose or Grey Chinese Goose, Anser cygnoides, Anserinae, Anatidae, Anseriformes.

Swan Goose or Grey Chinese Goose, Anser cygnoides, Anserinae, Anatidae, Anseriformes. The Swan Goose Anser cygnoides is a rare large goose with a natural breeding range in Mongolia, northernmost China, and southeastern Russia. It is migratory and winters mainly in central and eastern China. The species has been widely domesticated as the Chinese Goose and is extensively kept as poultry. The knob at the top of the beak is more prominent on males than females and more pronounced in domesticated specimens. In the wild it grazes on sedges, rarely swims and forms small flocks outside the breeding season. It is a rare goose of steppes and mountain valleys, which breeds near marshes and other wetlands. The Swan Goose is listed as endangered in the wild, the population declining due to habitat loss and excessive hunting.