Olrog's Cinclodes
Cinclodes olrogi
Large terrestrial Furnariid endemic to rocky hillsides and rushing streams of the Sierra de Comenchingones in central Argentina. From similar White-winged Cinclodes by Olrogs’ light brown (not white) bases to primary coverts, and darker chest contrasting markedly with white throat.
识别特征
Olrog's cinclodes is about 17 cm (6.7 in) long and weighs 24 to 32 g (0.85 to 1.1 oz). It is a small cinclodes with a medium-length slightly decurved bill. The sexes have the same plumage. Adults have a white supercilium, and blackish brown lores and ear coverts. Their crown is blackish brown and their upperparts dark gray-brown with a chestnut tinge. Their wings are a darker gray-brown with a wide white band across the base of the flight feathers. Their tail is dark gray-brown with dull rufous tips on the outer feathers. Their throat and breast are white with some dark scaling on the latter. The rest of their underparts are pale dull brown.
分类信息
Olrog cinclodes' English name and specific epithet honor the Swedish-Argentine biologist Claes C. Olrog.<p>One of the authors who first described Olrog's cinclodes (Nores) later treated it as a subspecies of what was then called the bar-winged cinclodes (C. fuscus sensu lato). (In a three-way split of the bar-winged that began in about 2009, C. fuscus was renamed to the present buff-winged cinclodes to avoid confusion with the previous much more complex species.) The species' namesake Olrog and several other authors maintained that it was more closely related to the gray-flanked cinclodes (C. oustaleti), and this has been confirmed by genetic data.<p>Olrog's cinclodes is monotypic.
- 学名
- Cinclodes olrogi
- 命名信息
- Nores & Yzurieta, 1979
- 目
- Passeriformes
- 科
- Furnariidae
- 属
- Cinclodes
分布与栖息地
Olrog's cinclodes is found in north-central Argentina. It occurs in the Sierras Grandes and Sierras de Comechingones of Córdoba Province and the Sierras de San Luis in adjoining San Luis Province. It inhabits open grassy landscapes, many of them rocky, and it usually is found near streams and lakes. In elevation it ranges between 1,600 and 2,800 m (5,200 and 9,200 ft).
- 迁徙
- Resident species
行为
Olrog's cinclodes is mostly a year-round resident throughout its range, though some individuals move to lower elevations after the breeding season.<p>Olrog's cinclodes feeds on arthropods and is assumed to eat other invertebrates as well. It forages singly or in pairs, gleaning prey from the ground, mud, and rocks.<p>Olrog's cinclodes breeds in the austral spring and summer, including at least November and December. It is assumed to be monogamous. It nests in a burrow at the end of a tunnel it excavates in an earth bank, in a crevice among rocks, or in a human structure's wall. It floors the nest chamber with plant fibers and hair. The clutch size is two eggs. The incubation period, time to fledging, and details of parental care are not known.<p>The song of Olrog's cinclodes and its vocal behavior have not been described.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Ochraceous Bulbul
Alophoixus ochraceus
A brownish-olive bulbul with a wispy crest and a puffy, glowingly white throat. Inhabits lowland and foothill forests, where it prefers primary or well-aged secondary growth. Forages in the middle and lower levels of forest, usually in small, noisy flocks. Calls consist primarily of loud, dry “chek” notes; variable song is pleasant and warbling. Extremely similar in appearance to closely related Puff-throated Bulbul, but smaller Ochraceous has darker and browner upperparts, duller yellow underparts, and a shorter crest.
Black-hooded Thrush
Turdus olivater
Medium-sized thrush of montane forests. Looks large and bulky compared to other thrushes in range; note male’s distinctive black head contrasting with brownish-olive body and yellow bill and legs. Female is similarly patterned but much duller. Found in highland forest and second growth, generally above 800 meters, where it is often the most common thrush. Most reliably seen at fruiting trees, where many individuals may congregate; also often seen at middle levels of forest, where it may take conspicuous perches to assess an observer before flying off. Song is a halting series of phrases, many of them doublets, generally alternating between rich, low notes and high reedy ones; call note is a rich, liquid bark. Male is unlikely to be confused with other species; female could be confused with female Pale-eyed Thrush but is larger, has darker eyes with distinct eyering and a semblance of male’s hooded look.
Large-headed Flatbill
Ramphotrigon megacephalum
A small flycatcher that is only found in bamboo patches in the lower levels of humid forests. Olive-green on the back, head and breast, with a distinctive yellow eyebrow wrapping around the eye, and a two-tone broad, flat bill. The belly is pale yellow and the wings are mostly dark but with two prominent cinnamon wingbars and cinnamon edges to the flight feathers. Rarely joins mixed-species flocks. The song is a very distinctive soft whistled “feeww-fuu,” repeated for long periods.
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