Spot-backed Antwren
Herpsilochmus dorsimaculatus
Small canopy antwren with a long, graduated tail. Males are largely gray with a black crown and a bold white eyebrow; the black spots on the back can be difficult to see. Females have a buff forehead and breast sides, with the black crown spotted white. Inhabits humid lowland forest and seasonally flooded forest in some regions. Almost invariably seen accompanying canopy mixed-species flocks. The song is a somewhat deep trill that slightly ascends and then descends: “wiwiwurrrrr.”
识别特征
The spot-backed antwren is 11 to 12 cm (4.3 to 4.7 in) long and weighs 9.5 to 10.5 g (0.34 to 0.37 oz). Adult males have a black crown and nape, a long white supercilium, a black streak through the eye, and grayish ear coverts. Their back and rump are dark gray with white edges on most back feathers and blackish patches. They have white-edged black scapulars and a hidden white patch between them. Their flight feathers are gray and black with white edges towards the end; their wing coverts are black with white tips. Their tail is black with white feather tips and white outermost feathers. Their throat and underparts are mostly white with a pale gray tinge on the sides and rear. Adult females have a buff forehead, some buff on their face, white spots on their crown, and a buff breast; they are otherwise like males.
分类信息
The spot-backed antwren was described by the Austrian ornithologist August von Pelzeln in 1868 and given its current binomial name Herpsilochmus dorsimaculatus. The spot-backed antwren is monotypic.
- 学名
- Herpsilochmus dorsimaculatus
- 命名信息
- Pelzeln, 1868
- 目
- Passeriformes
- 科
- Thamnophilidae
- 属
- Herpsilochmus
分布与栖息地
The spot-backed antwren is found in eastern Colombia and east across southern Venezuela and northwestern Brazil to the Rio Trombetas. It inhabits the subcanopy and canopy of humid evergreen forest. In Venezuela it favors igapó, in Colombia and much of Brazil terra firme forest, and some parts of Brazil campina woodlands on white-sand soils. In elevation it reaches 600 m (2,000 ft) in much of its range but only 500 m (1,600 ft) in Colombia.
- 迁徙
- Resident species
行为
The spot-backed antwren is thought to be a year-round resident throughout its range.<p>The spot-backed antwren's diet has not been detailed but includes insects and probably spiders. It forages singly, in pairs, and in family groups, and often as a member of a mixed-species feeding flock. It typically feeds between 15 and 30 m (50 and 100 ft) above the ground though sometimes as low as 5 m (15 ft). It forages mostly at the ends of leafy branches and in the crown of trees, often concentrating on vine tangles. It forages actively and usually captures prey by gleaning leaves, stems, and vines by reaching or lunging from a perch. It sometimes makes short salllies to hover-glean. It is not known to follow army ants.<p>Nothing is known about the spot-backed antwren's breeding biology.<p>The spot-backed antwren's song is a "very high, fast, slightly rising, then descending and fading, trilling 'wiwiwurrrrrrr' series" that lasts about two seconds. Its call is "a short...downslurred plaintive note, repeated often but irregularly".
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Philippine Eagle
Pithecophaga jefferyi
A huge and extremely rare raptor of lowland and montane forests. One of the largest eagles in the world, and the national bird of the Philippines. Dark brown above with pale feather edges, white underparts, a streaked shaggy crest and back of the neck, powerful yellow feet, a very thick silver-gray bill with a black tip, and black around the eye. Unmistakable if seen well perched. In flight, much broader-winged than other raptors. Voice is a descending, whistled “weeuuuu!” repeated at intervals.
Fasciated Wren
Campylorhynchus fasciatus
Large, noisy wren of dry and semi-humid areas; ranges from western Ecuador south to central Peru. Upperparts, sides, and tail are boldly barred with gray and white, and breast is spotted with gray. Similar to Band-backed Wren, but lacks chestnut on underparts, has paler breast spots, and prefers more arid habitats. Pairs or small groups forage conspicuously in bushes and trees, giving a variety of harsh, raspy calls.
Masked Finfoot
Heliopais personatus
A bizarre bird that loosely resembles a cormorant with a hornbill’s brightly-colored beak. Gray-brown overall with a black mask extending from the face down to the throat that is darker and more extensive in males. A reclusive species, typically encountered at dawn or dusk, skulking in well-vegetated waterways such as mangroves, swamps, and shaded rivers. Gives a loud odd bubbling call followed by an amphibian-like series of clucks.
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