Brown-backed Mockingbird
Mimus dorsalis
Handsome mockingbird found in scrubby areas in the high Andes. It has rich brown upperparts, mostly white underparts, and a white eyebrow. The brilliant white wing stripes and outer tail feathers flash conspicuously in flight, and help to separate it from the relatively plain Patagonian Mockingbird. Similar to White-banded Mockingbird, but tends to be browner (less gray) on the back and crown, has smaller white wing stripes, and is normally found at much higher elevations. It has a huge vocal repertoire ranging from shrill whistles to harsh churrs and metallic trills.
识别特征
The brown-backed mockingbird is 21 to 25.5 cm (8.3 to 10.0 in) long and weighs between 52 and 65 g (1.8 and 2.3 oz) with an average of 58.7 g (2.07 oz). The adult has a well-defined whitish supercilium, a black line through the eye, and dusky cheeks. Its crown and upperparts are chestnut brown that is brightest on the rump. The crown has darker streaks. Most of the tail is blackish but the outer three to four feathers are white. Its underside is whitish with a buff tinge to the chest, sides and flanks. The juvenile is similar with the addition of dusky spotting on its breast.
分类信息
The brown-backed mockingbird is a sister species to the white-banded mockingbird (Mimus triurus). It is monotypic.
- 学名
- Mimus dorsalis
- 命名信息
- (d'Orbigny & Lafresnaye, 1837)
- 目
- Passeriformes
- 科
- Mimidae
- 属
- Mimus
分布与栖息地
Most of the brown-backed mockingbird's range is in western and southern Bolivia, from La Paz Department south. It also entends into northwestern Argentina as far south as Tucumán Province.<p>The brown-backed mockingbird inhabits arid landscapes of brush, desert shrubs, and hedgerows, often near human habitation. In elevation it mostly occurs between 2,300 and 3,500 m (7,500 and 11,500 ft) but can be found as low as 1,700 m (5,600 ft) and as high as 4,200 m (13,800 ft).
- 迁徙
- Resident species
行为
The brown-backed mockingbird forages mostly on the ground, but details of its feeding behavior and diet have not been published.<p>The brown-backed mockingbird breeds from November to March. It constructs a cup nest of twigs, often in cactus and sometimes in a bush. The clutch is four eggs. Essentially nothing else is known about its breeding phenology<p>The brown-backed mockingbird's song is "a series of repeated harsh notes and chuckles".
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类

Seychelles Kestrel
Falco araeus
Unusually small kestrel with a gray head, a rufous back, unmarked buff underparts, a barred tail, and a dark “moustache” mark on the face. Found on several of the granitic Seychelles Islands. Originally found in areas of rainforest with cliffs and other rocky areas; now found in secondary scrub, cultivated areas, plantations, and towns, as well as in remnant natural habitat. Unlike other kestrels, does not hover. Call is a high, repeated “krii.” Shares general falcon shape with migrant and vagrant falcons, including Eleanora’s and Sooty Falcons, but smaller, with shorter, less pointed wings.

Eurasian Collared-Dove
Streptopelia decaocto
Large pale dove with a black crescent on the nape. Slightly smaller and paler than Rock Pigeon, with a proportionately longer, square-tipped tail. Favors farms and suburbs; avoids areas with extensive forests. Typically seen in pairs or small loose groups; forms larger flocks in winter. Widespread and common throughout much of Eurasia and northern Africa. Introduced to, and established in, much of North America, the Caribbean, and parts of Central America. Compare with African Collared-Dove, which may occur in small feral populations or as an escapee throughout Eurasian Collared-Dove’s range. Especially note tail pattern from below: mostly white, contrasting with the grayish undertail coverts, and with black extending down the outer edge of the tail feathers. Voice - a cooing “woop-WOOO!-woop” - is also helpful.

Isabelline Shrike
Lanius isabellinus
Small pale sandy-colored shrike. Male is gray-brown above with a black mask and unmarked pale underparts that contrast with a bright cinnamon tail. Female is similar, but with a paler mask, grayer upperparts, and faint barring on the sides. Both sexes have pale underparts. Red-tailed Shrike looks similar, but male Red-tailed Shrikes have a contrasting warm brownish crown and females average whiter on the underparts. Female Red-backed Shrikes also have a warmer brown back and more prominent scaling patterns on a white breast and belly than Isabelline Shrikes. Typically found in dry brushy areas. Song composed of various whistles, warbles, and mimicry; calls are harsh and sometimes nasal.
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