Red-gartered Coot
Fulica armillata
Fairly large, common, and widespread coot of lowlands. Found on fresh to brackish ponds and lakes; also at river mouths and locally on coastal waters. Feeds mainly while swimming, but also walks readily on shorelines. Bill pattern is diagnostic: pale yellow forehead shield is separated from brighter yellow bill by a broken dark red band. Also note the red “garters” on its legs, often hidden when swimming. Juvenile has extensively whitish head. Often occurs alongside White-winged and Red-fronted Coots.
识别特征
The red-gartered coot is 43 to 51 cm (17 to 20 in) long. The sexes are alike. Adults have a yellow bill and frontal shield with a patch of red between them. (The bill is sometimes reddish.) Their legs are orange-yellow to yellow with a pale red "garter" above the ankle. Their plumage is slaty gray that is blacker on the head and neck. Their undertail coverts are white. Immature birds have a paler bill than adults and olive legs and feet. Juveniles are drab gray-brown with dusky mottling on a white head and neck.
分类信息
The red-gartered coot is monotypic.
- 学名
- Fulica armillata
- 命名信息
- Vieillot, 1817
- 目
- Gruiformes
- 科
- Rallidae
- 属
- Fulica
分布与栖息地
The red-gartered coot is found from central and southern Chile, Paraguay, and southeastern Brazil south through Argentina to Tierra del Fuego. It has reached the Falkland Islands as a vagrant, and sight records in Bolivia lead the South American Classification Committee of the American Ornithological Society to classify it as hypothetical in that country. Fossils of this species are known from the Laguna de Tagua Tagua formation of Chile.<p>The red-gartered coot inhabits large ponds, lakes, rivers, and marshes, and in winter sheltered marine bays. It is generally a bird of the lowlands but occurs up to about 1,200 m (3,900 ft) in Patagonia, to 1,000 m (3,300 ft) in the southern Andes, and as high as 2,100 m (6,900 ft) in northwestern Argentina.
- 迁徙
- Complete migrants
行为
The red-gartered coot is believed to be mostly sedentary but does make some local movements and has strayed from its normal range.<p>The red-gartered coot feeds primarily on aquatic plants, mostly by diving in open water but also upends like a duck in shallower water. It also grazes on land near water.<p>The red-gartered coot's breeding season varies geographically, but is generally within September to November. It is monogamous and when breeding it is aggressive and territorial, though outside that season it is gregarious. It builds a loose platform nest of dried rushes with a rim, usually attached to rushes but sometimes floating. The clutch size is two to eight eggs; both parents incubate the eggs and care for the young.<p>Male red-gartered coots make a "whistled 'huit'" alarm call, in aggression "an explosive 'pit' and repeated 'wuw'", and when near a female a "repeated soft 'cuit'". The female's alarm call is "yec" and it also makes a "loud, repeated 'terr'."
保护状况
- 种群趋势
- unknown
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分布
鸟叫声
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