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The ducks, geese, and swans are small- to large-sized birds with a broad and elongated general body plan. [2] Diving species vary from this in being rounder. Extant species range in size from the cotton pygmy goose , at as little as 26.5 cm (10.5 in) and 164 g (5.8 oz), to the trumpeter swan , at as much as 183 cm (6 ft) and 17.2 kg (38 lb).
The avian family Anatidae, commonly called waterfowl, comprise the ducks, geese, and swans. The International Ornithological Committee (IOC) recognizes these 174 Anatidae species distributed among 53 genera, 32 of which have only one species. Eight species on the list are extinct; they are marked (E). [1]
Anseriformes is an order of birds also known as waterfowl that comprises about 180 living species of birds in three families: Anhimidae (three species of screamers), Anseranatidae (the magpie goose), and Anatidae, the largest family, which includes over 170 species of waterfowl, among them the ducks, geese, and swans. Most modern species in the ...
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.
Anser is a waterfowl genus that includes the grey geese and the white geese.It belongs to the true goose and swan subfamily of Anserinae under the family of Anatidae. [2] The genus has a Holarctic distribution, with at least one species breeding in any open, wet habitats in the subarctic and cool temperate regions of the Northern Hemisphere in summer.
The waterfowl that spend their winter at the Honker Hilton are largely domesticated geese and ducks who escaped from farms and ranches around the area, ultimately finding their way to Gibson Pond.
The musk ducks , sometimes included in this group, are noted for their bizarre habitus and pronounced sexual dimorphism; they are of uncertain position and decidedly aberrant. Their anatomy is more similar to Oxyura than to the two less derived genera, but still unique in many respects.
The upland goose or Magellan goose (Chloephaga picta) is a sheldgoose of the shelduck-sheldgoose subfamily of the Anatidae, the biological family that includes the ducks and most duck-like waterfowl such as the geese and swans. [2] [3] Sheldgeese resemble true geese and display similar habits, yet they are more closely related to shelducks and ...