Chestnut-backed Thornbird
Phacellodomus dorsalis
Handsome bird with a highly restricted range in the Marañon Valley of northern Peru. Back and tail are chestnut with a paler throat, head, and belly; breast is streaked with white. Inhabits arid mountain slopes, often around scrubby ravines. Usually found in pairs that often vocalize together, giving sharp chips in a short series, and sometimes in a much longer cascade.
识别特征
The chestnut-backed thornbird is 19 to 21 cm (7.5 to 8.3 in) long and weighs about 33 to 39 g (1.2 to 1.4 oz). It is the longest member of its genus and has the longest bill. The sexes have the same plumage. Adults have a light gray-brown supercilium that extends beyond the eye and spreads, a thin dark brownish "mask", and dull tawny brownish ear coverts. Their crown is dark gray-brown with dull rufous streaks, their upper back grayish brown blending to their chestnut lower back, their rump grayish brown, and their uppertail coverts reddish brown-tinged grayish brown. Their wings are mostly shades of brown with some rufescence and chestnut flight feathers that have fuscous tips. Their tail's central pair of feathers are dull chestnut with browner inner webs and the rest rufous-chestnut with dull brown tips. Their throat and malar area are white, their upper breast tawny brownish with rufous sides and whitish spots that form an irregular band, their lower breast and belly mottled whitish and brownish, and their undertail coverts rufescent brownish with vague mottling. Their iris is gray, their maxilla dark olive-horn to dark horn, their mandible silver-gray to olive-gray, and their legs and feet gray to blue-gray.
分类信息
The chestnut-backed thornbird is monotypic. It and the spot-breasted thornbird (P. maculipectus) are sister species.
- 学名
- Phacellodomus dorsalis
- 命名信息
- Salvin, 1895
- 目
- Passeriformes
- 科
- Furnariidae
- 属
- Phacellodomus
分布与栖息地
The chestnut-backed thornbird is endemic to Peru. It is known only from a few locations in the upper valley of the Marañón River, in the departments of Cajamarca, La Libertad, and possibly Ancash. It inhabits arid montane scrublands, typically those with short Prosopis or Acacia macracantha trees. In elevation it mostly ranges between 1,800 and 3,100 m (5,900 and 10,200 ft) but occasionally occurs as high as 3,400 m (11,200 ft).
- 迁徙
- Resident species
行为
The chestnut-backed thornbird is a year-round resident throughout its range.<p>The chestnut-backed thornbird's diet has not been studied but appears to be arthropods. It usually forages singly or in pairs, gleaning prey from branches and foliage up to about 4 m (13 ft) above the ground.<p>The chestnut-backed thornbird's breeding season is not known. It is thought to be monogamous. It builds a large cylindrical nest of sticks near the tip of a tree branch. Nothing else is known about its breeding biology.<p>The chestnut-backed thornbird's song is a "series of ticking 'chit-chit-chit-chit-chit' notes given for long periods and varying in intensity, either alone or accelerating and breaking into a loud, even loudsong 'chup-chup-chupchupchupchuppppp' accelerating at the end".
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Ochre-naped Ground-Tyrant
Muscisaxicola flavinucha
Fairly large terrestrial flycatcher, breeding in the southern Andes and migrating north in winter. Favors bogs, streamsides, and other wet areas in open rocky and stony terrain, but migrants can be grounded in lowland fields. Often in same areas as other ground-tyrant species, and identified by grayish plumage tones, whitish forehead patch, and contrasting ochre nape patch (can be hard to see, depending on angle).
Burnished-buff Tanager
Stilpnia cayana
A common tanager of savannas, forest borders, woodlands, and gardens. Often seen in pairs or with other species at fruiting trees, but usually not with mixed-species flocks. Males have a black face, throat, breast, and belly that is flanked by buffy sides. The crown and back are also buff and the wings and tail are dark-green. Females are buffy below with greenish back and wings, a pale throat, and a faint mask. The northern subspecies has a black mask (lacking the black throat and belly) with a violet gray throat and buffy belly.
Asir Magpie
Pica asirensis
A crow-like bird with a long, narrow tail. Flashy black-and-white pattern distinctive within range. An endangered species, this is a rare but conspicuous bird of juniper forest and riverine scrub between 2200–3000m in the Asir massif of southwestern Saudia Arabia, where it typically moves in pairs and small family groups. Very vocal, often giving loud querulous grating “kuaynk-kuaynk” calls and high-pitched woodpecker-like “keenk” notes. Does not overlap in range with Eurasian Magpie, but Asir has less white in the plumage, a larger bill, and a shorter tail.
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