Search results
Results from the WOW.Com Content Network
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]
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.
The coscoroba swan is a medium-large sized waterfowl, but smaller than the true swans, at 90 to 115 cm (35 to 45 in) long with a wingspan of about 155 cm (61 in). Males weigh 3.8 to 5.4 kg (8.4 to 12 lb) and females 3.1 to 4.5 kg (6.8 to 9.9 lb).
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).
Swans feed in water and on land. They are almost entirely herbivorous, although they may eat small amounts of aquatic animals. In the water, food is obtained by up-ending or dabbling, and their diet is composed of the roots, tubers, stems and leaves of aquatic and submerged plants. [16] Mute swan threatens a photographer in Toyako, Japan
The trumpeter swan has a large, wedge-shaped black bill that can be minimally lined with salmon-pink coloration around the mouth. The bill measures 10.5–12 cm (4.1–4.7 in), up to twice the length of a Canada goose (Branta canadensis) bill; the trumpeter swan bill is the largest of any waterfowl species in the world. The legs are gray-pink ...
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 black-necked swan is the only member of its genus that breeds in the neotropics and is the largest waterfowl native to South America. Adults are 102 to 124 cm (40 to 49 in) long with a wingspan of 135 to 177 cm (53 to 70 in).