bird genus - a genus of birds

Anatidae, family Anatidae - swimming birds having heavy short-legged bodies and bills with a horny tip: swans; geese; ducks

Anser cygnoides, Chinese goose - very large wild goose of northeast Asia; interbreeds freely with the graylag

Anser anser, graylag, greylag, greylag goose - common gray wild goose of Europe; ancestor of many domestic breeds

Chen, subgenus Chen - wild goose having white adult plumage