Million Of Geese, Missouri, United States

The Blue-winged Goose, Cyanochen cyanopterus belongs either to these, or to lineage closer to ducks.
The Spur-winged Goose, Plectropterus gambensis, is most closely related to the shelducks, but distinct enough to warrant its own subfamily, the Plectropterinae.
The three species of small waterfowl in the genus Nettapus are named "pygmy geese", e.g. the Cotton Pygmy Goose (N. javanica). They seem to represent an ancient lineage like the Cape Barren Goose and the Spur-winged Goose.
A genus of prehistorically extinct seaducks, Chendytes, is sometimes called "diving-geese" due to their large size.