Buckley's Forest-Falcon
Micrastur buckleyi
Elusive falcon of lowland and foothill rainforest east of the Andes. Note black upperparts, white underparts, white hindcollar, and dull yellow face. Female may show white spots on wings. Immature is barred underneath with brownish nape. Adult is very similar to pale morph Collared Forest-Falcon but slightly smaller; ID is best confirmed by voice. Typical song of Buckley’s is “kawah, koh”, sometimes followed by a lower “koh” note. Usually stays inside forest and is infrequently seen.
识别特征
Buckley's forest falcon is 41 to 51 cm (16 to 20 in) long. Its wingspan is 61 to 72 cm (24 to 28 in). Adult males have black upperparts with a white collar. Their cheeks, throat, and underparts are white and unmarked. Their tail is black with three narrow white bars on the inner feathers and four on the outer ones. Their iris is dark brown, their cere, lores, and bare skin around the eye are dull greenish, and their legs and feet are yellowish. Adult females are like males with the addition of white spots on their scapulars and secondaries. Juveniles are also black above but have a buffy breast and dark bars on the belly.
分类信息
Buckley's forest falcon was previously considered to be a variant of the collared forest falcon (M. semitorquatus). The two of them and the slaty-backed forest falcon (M. mirandollei) are sister species. It is monotypic.
- 学名
- Micrastur buckleyi
- 命名信息
- Swann, 1919
- 目
- Falconiformes
- 科
- Falconidae
- 属
- Micrastur
分布与栖息地
Buckley's forest falcon is known from only a few specimens, photographs, and sightings. It has been documented in Bolivia, extreme western Brazil, eastern Ecuador, and eastern Peru. A few sight records in Colombia and Venezuela lead the South American Classification Committee of the American Ornithological Society to classify it as hypothetical in those two countries. Most of the records are from lowland tropical and subtropical forest at elevations between 100 and 700 m (300 and 2,300 ft) but one specimen was collected at 1,800 m (5,900 ft) in Ecuador and there is a record at 1,350 m (4,400 ft) in Peru.
- 迁徙
- Resident species
行为
Buckley's forest falcon is assumed to be a year-round resident.<p>Almost nothing is known about the diet or hunting technique of Buckley's forest falcon. One specimen had a small Mesomys arboreal rat in its stomach. The species' small feet suggest that birds are only a minor part of its diet.<p>Sightings of Buckley's forest falcon fledglings suggest that its breeding season includes April to early August. Nothing else is known about its breeding biology though it is assumed to nest in tree cavities like other Micrastur forest falcons.<p>The most common Buckley's forest falcon vocalization is "a far-carrying, nasal "eeok, oow" or "eeok, oow...ow", repeated...for long periods, mainly at dawn." It also occasionally makes "a long rising series of "kaw" notes followed by 2-3 falling "aauw" notes".
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
White-eared Night Heron
Oroanassa magnifica
Rare and elusive night-heron with a bug-eyed, almost “alien,” appearance. Highly localized, seldom encountered far from its nesting colonies and roost sites. Black above with gray streaking on the chest and a clean white-and-orange head pattern, though this can be hard to see in poor lighting. Forages quietly in well-shaded forest streams, but most reliably seen in its small breeding colonies, usually hidden deep in a stand of bamboo or evergreen trees.
Freckled Nightjar
Caprimulgus tristigma
Large, grayish nightjar. Both sexes show a small white mark in the outer wing. Male shows large white tail corners, while the female’s tail is plain. Found on rocky hills and outcrops, usually in savannah. Song is a loud, repeated “kow-chow.” Most similar to Eurasian Nightjar, but smaller, and lacks strong pale markings on the upperparts.
Sennar Penduline-Tit
Anthoscopus punctifrons
A tiny drab bird with a sharp bill, a dull olive-gray back, buff underparts, and a black-speckled forehead. Found in dry savanna and thornscrub, usually in pairs or small flocks. Tame but inconspicuous. Similar to Yellow Penduline-Tit, but much duller: buffy rather than yellow below, without white edges on the wing feathers. Vocalizations include high-pitched “sit” notes and long dry trills.
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