Anserinae

The Anserinae are a subfamily in the waterfowl family Anatidae. It includes the swans and the true geese. Under alternative systematical concepts (see e.g., Terres & NAS, 1991), it is split into two subfamilies, the Anserinae contain the geese and the ducks, while the Cygninae contain the swans.

Systematics
Swans (Tribe Cygnini)
 * Genus Cygnus – true swans: The black-and-yellow-billed swans are sometimes separated in the genus Olor.
 * Genus †Afrocygnus (Miocene of North Africa)
 * Genus †Annakacygna – short-winged swans (Miocene of Japan)
 * Genus †Megalodytes (Miocene of California)

True geese (Tribe Anserini)
 * 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 (Cereopsinae), or alternatively into the shelduck subfamily Tadorninae:

Tribe Cereopseini


 * Genus Cereopsis – Cape Barren goose
 * Genus †Cnemiornis – New Zealand geese (prehistoric)

Some enigmatic subfossils of very large goose-like birds from the Hawaiian Islands do not appear to be moa-nalos (goose-sized dabbling ducks). They cannot be assigned to any genus living today, though most, if not all, may be fairly close to Branta:
 * Geochen rhuax – initially allied with Cereopsis, but this seems hardly correct for reasons of biogeography.
 * Giant Hawaiʻi goose, ?Branta sp.
 * Giant Oʻahu goose, Anatidae sp. et gen. indet.