Anatidae


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Anatidae

[ə′nad·ə‚dē]
(vertebrate zoology)
A family of waterfowl, including ducks, geese, mergansers, pochards, and swans, in the order Anseriformes.

Anatidae

 

a family of aquatic birds of the order Anseriformes. The body length varies from 29 to 150 cm. The edges of the bill are lined with thin transverse plates or serrations. The feet are webbed. The dense plumage, which is white, gray, brownish, black, or spotted, has a thick down covering. Some Anatidae have a dark-blue, green, or spotted speculum on the wings. The majority fly well. Many are good divers, obtaining food from the water itself or from the bottom.

Anatidae, which include swans, geese, brants, and ducks, are distributed throughout the world. The family comprises 43 genera, which encompass 147 species. There are 58 species in the USSR, including eight species that occasionally migrate into but are not indigenous to the USSR.

Anatidae nest on the ground, in rock crevices, in tree hollows, or in burrows. A clutch contains two to 16 solid white, greenish, or yellowish eggs. Depending on the species, the eggs are incubated and the young are reared by the female alone, by the male alone, or by both. The South American duck of the genus Heteronetta is parasitic, that is, it lays its eggs in the nests of other Anatidae. Anatidae feed on plants and animals. Many are hunted commercially or for sport.

REFERENCE

Ptitsy Sovetskogo Soiuza, vol. 4. Edited by G. P. Dement’ev and N. A. Gladkov. Moscow, 1952.
References in periodicals archive ?
The flight is often contagious among Anatidae, once a member of the group fly, all the rest of the group will do the same thing.
Comparing with other Anatidae, such as, the Ferruginous Duck (Aythya nyroca) the White-headed Duck (Oxyura leucocephala) this activity is observed with slightest rate [2, 30, 42], it is probably due to the disturbance that the site knows.
It is observed that this activity is mainly nocturnal at the majority of the Anatidae [50, 51, 52, 53, 24, 27, 26, 28, 29, 40].
We propose that a better understanding of the threat of future spread can be obtained by identifying specific climatic and vegetation zones that are important in the life cycle of Anatidae, and which account for a disproportionately large number of HPAI outbreaks.
The easternmost ecoregions, the Kazakh forest steppe (location of Lake Chany, an Anatidae habitat and breeding area) and the Kazakh Steppe, accounted for 132 cases, with the first case recorded on July 18, 2005.
It is obvious that the distribution pattern of Anatidae is dependent on ecologic variables, and some of these variables are summarized by the ecoregion concept.
Tracheal anatomy of the Anatidae and its taxonomic significance.
Comparative studies on the behaviour of the Anatidae.
Analyses were performed for all species and separately for species of the Anatidae family (ducks, swans, geese) and waders (shorebirds of the families Scolopacidae and Charadriidae), which are essentially associated with wetlands or coastlines.
This pattern is even clearer for birds of the Anatidae family: They are abundant from October to January and in very small numbers from March to September.
We document and discuss the possible role of migratory birds in the spread of HPAI H5N1 virus during the second half of 2005, on the basis of information and data concerning the role of waterfowl in the ecology of avian influenza viruses; the pattern of Anatidae bird migrations across the western Palearctic, and contemporary, satellite-derived temperature data.
Species from the Anatidae family, in particular, the Anatinae subfamily (ducks), represent the highest risk for transmission to domestic poultry (16,17) for the following reasons: 1) Anatids harbor the most diverse and highest prevalence of avian influenza viruses (13,14); 2) historical outbreaks of HPAI in poultry have been linked mainly to strains circulating in ducks, rather than in members of other species (18,19); 3) domestic ducks (mallards) can excrete large amounts of HPAI H5N1 virus while remaining relatively healthy and are thus able to move the virus across large distances (7); and 4) direct contacts between wild anatids and domestic aquatic poultry are believed to be relatively more common than with other groups of wild birds (20).