African Collared-Dove
Streptopelia roseogrisea
A pallid, medium-sized bird of dry scrub and desert; also agricultural land, towns, and gardens. Native to northern Africa and the southwestern Arabian Peninsiula; established in Puerto Rico and New Zealand, but also found in pockets across North America. Compare with Eurasian Collared-Dove, which also has a black collar on the hindneck; note that Eurasian Collared-Doves are generally darker overall, have more extensive black at the base of the undertail, and the primaries are distinctly darker than the remainder of the wing. In flight, Eurasian Collared-Doves have a tricolored pattern to the upperwing rather than the somewhat uniform appearance of African Collared-Doves. Song is “oo-rrroooo-oooo,” loudest at start, than trailing off.
识别特征
The African collared dove (Streptopelia roseogrisea) is a small dove found in the Sahel, northern parts of the Horn of Africa and southwestern Arabia. Although it lives in arid lands, it is found around water sources. This bird is typically around 26 cm (10 in) in length and 130–166 g weight. Its upper body, from shoulders to tail, is a pale greyish brown, though the wing edge has a bluish tinge. The flight feathers are darker, and nearly black. The head, neck and breast are pinkish shading to white on the chin and belly. There is no sexual dimorphism. Two subspecies are currently accepted, though the genetic difference is minimal and the species may be better considered monotypic. Streptopelia roseogrisea roseogrisea — nominate subspecies; across Africa in the Sahel region just south of the Sahara Desert east to north-central Sudan Streptopelia roseogrisea arabica (Neumann, 1904) — northeast Sudan to Eritrea and Somalia, and southwestern Arabia; slightly darker than nominate The African collared dove is the wild ancestor of the domestic Barbary dove; some in the past have suggested that the Eurasian collared dove (Streptopelia decaocto) may also have been involved, but there is only minimal evidence to support this. The African collared dove is able to interbreed with the Barbary dove, and it is thought that the increase in the range of colours of Barbary doves available that occurred in the later 20th century was the result of the importation of African collared doves into the United States for interbreeding. It has a diet of grass seeds and other plants. They would also eat berries, insects, and snails.
分类信息
Genus: Streptopelia; Family: Columbidae; Order: Columbiformes.
- 学名
- Streptopelia roseogrisea
- 命名信息
- (Sundevall, 1857)
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Streptopelia
分布与栖息地
- 迁徙
- Complete migrants
行为
Migration pattern: Complete migrants.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Red Knot
Calidris canutus
Stocky, medium-sized shorebird with relatively short bill and legs. Combination of shape, overall color, and bill size usually distinctive. Beautiful breeding plumage shows entirely salmon-orange underparts and silvery wings with intricate patterning. Nonbreeding is plain gray with pale underparts and a white eyebrow; juvenile similar but with scaly pattern on wings. Usually shows dark barring on flanks. Legs are dull greenish or gray. Widespread and fairly common, breeding on high Arctic tundra and wintering on coastlines around the globe, as far south as Tierra del Fuego. Most numerous on beaches and mudflats; less common inland. Occurs in flocks, often mixed with other shorebirds. Compare with larger, lankier, longer-billed Great Knot in Asia and Australia. Feeds on a variety of small invertebrates; West Atlantic population reliant on horseshoe crab eggs during spring migration.
Socotra Buzzard
Buteo socotraensis
A typical medium-sized brown-and-white buzzard that was only recognized as distinct in 2010. The underparts are whitish buff with heavily streaked underparts (lighter on the throat). Underwings display significant contrast, with pale primaries and secondaries standing out against black 'wrists' and rusty 'wingpits'. Juveniles are buffier and less heavily streaked. Uncommon resident endemic to Socotra, mostly between 150–800m, preferring ravines and cliffs; other buzzards are vagrants. Calls like other buzzards.
Red-headed Bunting
Emberiza bruniceps
Large, stocky bunting with a long tail. Rusty-red head and yellow body easily identify the breeding male; non-breeding male has restricted red on the head and a streaky brown back. Female and juvenile are pale brown with streaked back and wings; these plumages can be nearly impossible to separate from Black-headed Bunting. Look out for Red-headed’s less extensive crown streaking, less “compact” appearance (longer-billed and longer-tailed), less yellow underparts, and colder back coloration. Breeds in open dry spaces with scattered bushes; winters in agricultural fields. Song starts out with a few dry, rasping notes, then turns into a more fluid-sounding jumble.
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