White-banded Mockingbird
Mimus triurus
Distinctive mockingbird with large white wing patches, visible at rest and spectacular in flight. It is largely whitish below with a gray head and cinnamon rump. The tail is mostly white with black central feathers. Found in savannas and other semiopen areas. The song is variable and includes songs of other species.
识别特征
The white-banded mockingbird is 20 to 23.5 cm (7.9 to 9.3 in) long and weighs 49 to 54 g (1.7 to 1.9 oz). The male is slightly larger than the female. Adults have a grayish crown, a white supercilium, a blackish line through the eye, and speckled cheeks. Their upperparts are smoky gray blending to reddish cinnamon on the rump. The central third of the tail is black and the outer feathers white. The folded wing shows a broad white band; the rest of the wing is blackish. The white on the wings and tail are conspicuous in flight. The adults are mostly whitish below; the sides and flanks have a cinnamon wash and the vent area is buffy. The juvenile is similar but with a spotted breast and less white in the wing.
分类信息
The white-banded mockingbird and the brown-backed mockingbird (Mimus dorsalis) are sister species. Both are monotypic.
- 学名
- Mimus triurus
- 命名信息
- (Vieillot, 1818)
- 目
- Passeriformes
- 科
- Mimidae
- 属
- Mimus
分布与栖息地
The white-banded mockingbird breeds primarily in central Argentina. In the non-breeding season it apparently withdraws from the southernmost part of its range and is also found in Bolivia, Brazil, Chile, Paraguay, and Uruguay. It is suspected to regularly breed in all of these countries except Brazil and Chile. Vagrants have been recorded in Peru and the Falkland Islands.<p>The white-banded mockingbird inhabits a variety of landscapes including low woodlands, savanna, open brushy country, steppe, and around human habitations. It is mostly found below 500 m (1,600 ft) of elevation but breeds as high as 2,600 m (8,500 ft) in northern Argentina and as a non-breeder reaches higher in Bolivia and Chile.
- 繁殖区
- SA : c Argentina
- 非繁殖区
- to Bolivia and s Brazil
- 迁徙
- Complete migrants
行为
The white-banded mockingbird is thought to be mostly insectivorous in the breeding season but almost nothing is known otherwise.<p>The white-banded mockingbird's nest is an open bowl made of twigs lined with softer material. It is placed low in vegetation, often a thorny bush. It lays its clutch of four eggs (occasionally three) in November and December. Nests are frequently parasitized by the shiny cowbird (Molothrus bonariensis).<p>The white-banded mockingbird is a "[s]uperlative songster, the most outstanding of genus". Its song is " a long, loud and extended stream of melodic notes and phrases" and it is an excellent mimic.
保护状况
- 种群趋势
- unknown
照片
分布
鸟叫声
其他鸟类
Souimanga Sunbird
Cinnyris sovimanga
Small, hyperactive bird with a curved bill. Breeding males are colorful, with iridescent upperparts, and a yellow belly in most of the range, and a white belly in southwest Madagascar. Females are much duller, but can be told from female Madagascar Sunbird by their smaller size, smaller bill, and less distinct streaks below. Common in any habitat with woody vegetation. Feeds mainly on nectar, and flits around constantly. The song is a cheerful and explosive jumble of high-pitched notes.
Black-cheeked Mountain Tanager
Anisognathus melanogenys
Large, colorful tanager found only in the Santa Marta Mountains of Colombia. Note the black mask, yellow dot behind eye, and azure crown; plumage is otherwise blue and yellow. Usually seen in the canopy of cloud forest, often in pairs, and regularly joins mixed species flocks. It is rather quiet for a mountain-tanager, and typically just gives soft chip notes. Quite common in the upper parts of El Dorado Nature Reserve.
Cory's Shearwater
Calonectris borealis
Large, lumbering shearwater. Diagnostic yellow bill is often visible from quite a long distance. Look for warm pale brown upperparts and clean white belly and underwings. Also note little contrast between the brown head and white throat (compare with distinct capped appearance of Great Shearwater). Lazier wingbeats than other large shearwaters, especially in calm conditions; wings look crooked with wrists pushed forward in flight. Forms mixed flocks with other shearwaters, especially when feeding. Fairly common in warm water in the Atlantic Ocean; increasingly frequent in cooler water, ranging further northward in recent years. Very similar to closely related and recently split Scopoli’s Shearwater. Can be identified with caution, and often by analysis of photographs, by the solidly dark outer part of the underwing.
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