Gourt > Science > Biology > Flora and Fauna > Animalia > Chordata > Aves > Anseriformes (14)
The order Anseriformes contains about 150 species of birds in three families: the Anhimidae (the screamers), Anseranatidae (the Magpie-goose), and the Anatidae, which includes over 140 species of waterfowl, among them the ducks, geese, and swans.
All species in the order are highly adapted for an aquatic existence at the water surface. All are web-footed for efficient swimming (although some have subsequently become mainly terrestrial).
Evolution
The earliest known Anseriform is the recently discovered Vegavis, which lived during the Cretaceous period *. It is thought that the Anseriformes originated when the original Gallo-anserae (the group to which Anseriformes and Galliformes belong) split into the two main lineages. The extinct dromornithids represent early offshoots of the anseriform line, possibly derived from screamer-like ancestors. The ancestors of the Anseriformes developed the characteristic bill structure that they still share. The combination of the internal shape of the bill and a modified tongue acts as a suction pump to draw water in at the tip of the bill and expel it from the sides and rear; an array of fine filter plates called lamellae traps small particles, which are then licked off and swallowed. More on [ Anseriformes ]
Waterfowl :: Poultry
Waterfowl :: Bird Hunting
@Moonanet Mm... vamos a dejarlos en que son aves anseriformes xD
StBarry (Saint Barry) Sat, 24 Oct 2009 20:32:01 -0000
@Moonanet Mm... vamos a dejarlos en que son aves anseriformes xD
Duckdata - Bibliography of literature on the ecology, conservation, and management of North American waterfowl and their habitats.
International Goose Research Group - Researchers interested in the biology and management of arctic-nesting geese. Links to organizations and projects, references, and brief species accounts.
Meta Description: [ International Goose Research Group (www.goose.org) ]
Jan's Ornamental Waterfowl Pages - Photos of almost 150 species of waterfowl.
Meta Description: [ Wildfowl and Waterfowl of the world. Ducks, geese, swans, waders etc. Including all Anseriformes, Gruiformes, Ciconiiformes and Charadriiformes ]
Natural History of Wildfowl - Short article from Wildfowling Magazine.
Meta Description: [ Natural history of wildfowl waterfowl ducks and geese nature biology zoology ]
Order Anseriformes - Articles about species belonging to the order which includes ducks, geese, and swans.
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