Anserinae

The Anserinae are a subfamily in the waterfowl family Anatidae and includes the swan and geese. Under alternative systematical concepts, it is split into two subfamilies. The Anserinae contains geese and ducks, while the Cygninae contains the swans.

Systematics

Swans

Genus Cygnus – true swans: The black-and-yellow-billed swans are sometimes separated in the genus Olor.
Genus †Afrocygnus
Genus †Annakacygna – short-winged swans
Genus †Megalodytes

True geese

Genus Anser – grey and white geese
Genus Branta – black geese

Unresolved

Genus Coscoroba – coscoroba swan

These two genera are distinct from other geese and often elevated to a subfamily of their own, or alternatively into the shelduck subfamily Tadorninae:
Tribe Cereopseini

Genus Cereopsis – Cape Barren goose
Genus †New [Zealand geese|Cnemiornis] – New Zealand geese

Some enigmatic subfossils of very large goose-like birds from the Hawaiian Islands do not appear to be moa-nalos or B. rhuax. They cannot be assigned to any genus living today, though both may be fairly close to Branta:

Very large Hawaiʻian goose, ?Branta sp.
Giant Oʻahu goose, Anatidae sp. et gen. indet.