Ruddy-headed Goose
Chloephaga rubidiceps
A rare and endangered goose on the South American mainland, but fairly common in the Falkland Islands. This subtly attractive austral goose is easily passed off as a female of the slightly larger Upland Goose. Relative to female Upland, Ruddy-headed (in which sexes look alike) has a shorter ruddy neck (which can be fairly dull and pale, especially in the Falklands) with narrow white eye crescents and a pale forehead; body is cleaner and paler gray with dark rusty belly and vent; legs are deeper orange. In flight, bold wing pattern is like female Upland. Found in pairs or small groups, readily associating with Upland Geese.
识别特征
The ruddy-headed goose is 45 to 52.5 cm (18 to 21 in) long. Males weigh 1.65 to 2.02 kg (3.6 to 4.5 lb) and females 1.20 to 1.50 kg (2.6 to 3.3 lb). Adults have the same plumage. Their heads and necks are red-brown, their back, breast, and flanks gray and buff with brown barring, their belly cinnamon, and their tail black. Their wing's upperside is gray and the underside gray, black, and white. Their bill is black and the legs and feet orange with black markings. Juveniles are similar to adults but duller overall.
分类信息
The ruddy-headed goose is monotypic.
- 学名
- Chloephaga rubidiceps
- 命名信息
- Sclater, PL, 1861
- 目
- Anseriformes
- 科
- Anatidae
- 属
- Chloephaga
分布与栖息地
The ruddy-headed goose is found in the eastern Chilean and Argentinian parts of Tierra del Fuego and north from there to Buenos Aires Province, Argentina. It is also found on the Falkland Islands. It inhabits open landscapes such as meadows, Pampas wetlands, the borders of ponds, and coastal grasslands.
- 迁徙
- Complete migrants
行为
Ruddy-headed geese are year-round residents of the Falkland Islands, though they make local movements there. The species nests in Tierra del Fuego and far southern mainland Argentina and for the winter migrates north from there as far as Argentina's Buenos Aires Province.<p>The ruddy-headed goose is almost entirely vegetarian and feeds mostly on the ground rather than in water. On the breeding grounds its diet is small berries and the roots, leaves, stems, and seeds of grasses and sedges. During winter it feeds on young wheat and in harvested fields of maize, sunflower, and sorghum.<p>The ruddy-headed goose's breeding season begins as early as September on the Falkland Islands and in mid-October on the mainland. It nests singly or in small loose groups. Nests are placed in long grass or amid boulders and are lined with down. The clutch size is three to eight eggs. Males guard females during the incubation period of about 30 days. The time to fledging is not known.<p>Male and female ruddy-headed geese have different vocalizations: Males make a "short, whistled 'seep'" and females a "short rasping quack".
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Cardinal Woodpecker
Dendropicos fuscescens
A small, compact woodpecker with heavily streaked underparts and a solid black moustachial streak. In the female the top of the head is completely dark, while in the male the forecrown is brown and hindcrown and nape are red. Pairs inhabit a wide range of savanna, woodland, forest-edge, and riverine forest, where they feed in dead branches and smaller twigs ignored by larger woodpeckers. An angry-sounding, dry, trilled rattle call often gives it away.
Sumba Flowerpecker
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Small and stout forest-dweller that hops and buzzes about in the canopy like a large, active insect. Note male’s iridescent dark blue back, bright red chest, and black line extending down the white belly. As with many other flowerpeckers, the female is considerably duller, with a red rump patch being the only patch of bright color on her otherwise gray-brown plumage. Endemic to Sumba, where found in wooded habitats throughout the island. Gives a short, descending series of whistles, as well as piercing high-pitched notes.
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Panyptila cayennensis
Small, fast-flying swift of humid tropical lowlands. Usually seen in pairs flying low over the forest canopy, but also ranges out over adjacent open areas, lakes, and rivers. Often in loose association with other small swifts, especially Vaux’s. Note the very narrow wings and long swallow tail, which is usually held closed in a long fine point rather than being spread to show the fork. The small size and bright white throat that contrasts with the black cap and body are distinctive.
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