Masafuera Rayadito
Aphrastura masafuerae
Restricted to largely inaccessible Isla Selkirk (formerly Isla Masafuera) in Juan Fernández Islands, Chile, where it is uncommon and restricted to higher elevations. Favors dense fern forest and is often somewhat skulking, although can be tame and confiding when found. No similar species on the island. Plumage resembles Thorn-tailed Rayadito of mainland Chile, but less brightly patterned with duller pale eyebrow and duskier underparts.
识别特征
The Masafuera rayadito is 14 to 15 cm (5.5 to 5.9 in) long. The sexes have the same plumage. Adults have a poorly defined buff-brown supercilium on a dusky face. Their forehead is whitish with narrow rufous streaks and their crown is dark dusky brown. Their back is dull brown and their rump rufous-brown. Their wing coverts are blackish with tawny tips and their flight feathers are blackish with dull rufous bases. Their tail is mostly rufous with blackish bases on all but the central pair of feathers; the ends of the feathers lack barbs, giving a spiny appearance. Their throat is whitish, their breast and belly dull buffy gray-brown with a rufescent tinge, and their flanks and undertail coverts rufescent. Their iris is brown, their maxilla horn-brown or yellowish white with a horn tinge, their mandible yellowish horn, and their legs and feet horn-gray.
分类信息
The Masafuera rayadito is monotypic. It shares genus Aprrastura with the thorn-tailed rayadito (M. spinicauda) of the South American mainland. They are thought to have diverged in the Pleistocene.
- 学名
- Aphrastura masafuerae
- 命名信息
- (Philippi & Landbeck, 1866)
- 目
- Passeriformes
- 科
- Furnariidae
- 属
- Aphrastura
分布与栖息地
The Masafuera rayadito is found only on Alejandro Selkirk Island in the Juan Fernández Archepeligo, about 670 km (360 nmi; 420 mi) off the coast of Chile. It inhabits thick undergrowth in semi-humid to humid montane scrub and also wooded areas with much Dicksonia externa tree fern. It often occurs along streams, and often in stands of the canelo tree Drimys confertifolia. In elevation it usually occurs between 800 and 1,300 m (2,600 and 4,300 ft) but occasionally goes as low as 400 m (1,300 ft) in the austral winter.
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
其他鸟类
Nicholson's Pipit
Anthus nicholsoni
A large, slender pipit that is usually found in rocky areas. Note the pale eyebrow, long tail, and relatively long bill. Prefers dry, open areas with clumps of vegetation and scattered rocks and boulders, typically on slopes. Calls include squeaky sparrow-like chirps and sweet two-noted whistles. Song is a sequence of plaintive whistles, chirps, and other call-like vocalizations strung together with pauses in between. As with many other pipits, can be frustratingly difficult to identify in the field. Habitat and voice are important clues. Very similar to Mountain Pipit, but less streaky, especially on the breast. Larger than African Pipit, with buffy rather than white outer tail feathers.
Blue-billed Duck
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Small stiff-tailed diving duck with a relatively slender dished bill. Floats very low in the water, and unlikely to be seen on land. Male has intense chestnut and black plumage, bright blue bill. Female is dark grayish. Usually observed on the water on deep wetlands. Much longer and less chunky bill than Musk Duck.
Red-breasted Parakeet
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Swarthily mustachioed parakeet of lowland forests and forest edges; found in gardens and parks in its introduced range. Both sexes are bright green with salmon-colored chests, gray-blue heads, and a black mustache. Males have a bright red upper bill, while females’ bills are wholly black. Usually seen flying over speedily, giving high-pitched, grating shrieks.
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