White-bridled Finch
Melanodera melanodera
Handsome “finch” (actually a tanager); scarce and local on grassy Patagonian steppe, but fairly common locally on heathland in Falklands; also ranges to coastal dunes, mainly in winter. Found in pairs or small groups, feeding on the ground. Male is distinctive with a black throat framed in white and yellow wing and tail edgings; bright sulfur-yellow wings of mainland birds flash in flight while Falkland birds are dull-winged. Female is streaky overall and is best identified by habitat, company of males, and yellow edgings to wing and tail feathers. Compare with female Plumbeous Sierra-Finch and female Yellow-bridled Finch.
识别特征
The male is grey-green above and yellow below with a grey head and upper breast. It has a black throat and mask which are bordered with white. There are large yellow patches in the wings and tail. Females are brown with dark streaks. They have yellow outer tail feathers and yellow fringes to the wing feathers.<p>It is 14–15 cm (5.5–5.9 in) long. Birds on the mainland are smaller than those on the Falklands with a smaller bill and more yellow in the wings and tail.<p>The call is a short, high-pitched note and the song is a repeated series of two or three whistles. It sings from a low perch such as a rock or grass tussock.
分类信息
- 学名
- Melanodera melanodera
- 命名信息
- (Quoy & Gaimard, 1824)
- 目
- Passeriformes
- 科
- Thraupidae
- 属
- Melanodera
分布与栖息地
It is common throughout the Falklands where it occurs up to about 150 m (490 ft) above sea level but is most often found in coastal areas. On the South American mainland, it is thinly distributed up to 580 m (1,900 ft) above sea level in Magallanes Region in Chile and Santa Cruz Province in Argentina. Its range extends southwards from about 47°S to northern Tierra del Fuego. It is typically found in flat areas of grassland, heathland, farmland, or dunes.<p>The population on the Falklands is about 7,000-14,000 pairs and the species is not considered to be threatened. However, it is thought to be declining on the mainland because of overgrazing.[citation needed]
- 迁徙
- Resident species
行为
It forages on the ground, feeding mainly on seeds, especially those of grasses.<p>The nest is built of grass and lined with hair or feathers. It is placed low down in grass or between stones. Three or four eggs are laid and are usually blue-grey or grey-green with purple-brown markings towards the larger end.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Tristram's Warbler
Curruca deserticola
Small, long-tailed Curruca warbler, very similar to Spectacled and Subalpine Warblers. Males are distinctive with very deep rusty underparts, a rusty throat (sometimes paler mid-throat), rusty wings, and a hint of pale buff moustache. Females are pale brown and less distinctive with normally rather warm-toned underparts. Breeds on mountain slopes covered in dense, low bushes, tamarisk scrub, and vegetated desert wadis; non-breeding habitat is sometimes lower in elevation, but typically similarly open and scrubby. Song a scratchy whistle. Call a low "trrrrr."
Black-throated Coucal
Centropus leucogaster
A large forest coucal with a black throat and chest and a white belly. Western populations in the Democratic Republic of the Congo and extreme western Uganda are sometimes separated as Neumann’s Coucal based on their smaller size, but look very similar to eastern Black-throated Coucal populations. The similar Gabon Coucal, which has a rufous belly, replaces Black-throated in Central African forests. Black-throated typically gives a deep, bubbling, booming call series of up to 20 notes that fall and then rise in pitch. This call can be heard day or night.
Red-billed Tropicbird
Phaethon aethereus
Spectacular seabird, very rarely seen from land but found locally around rocky islands near shore. Usually seen as single birds sitting on the sea or as pairs chasing and screeching around cliffs, often high overhead. Feeds by vertical plunge dives, which produce a plume of water like a mini whale blow. Adult has stout red bill and long white tail streamers. Immature has yellow bill and short, black-tipped tail.
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