Narrow-billed Antwren
Formicivora iheringi
Long-tailed antwren with white flanks, unmistakable within its restricted range. Males are dark gray with a black bib. Females are olive-brown above and cinnamon below with two buff wing bars. Found in deciduous forests, where it forages from the understory to middle levels, usually alone but sometimes loosely accompanying mixed-species flocks. Songs a long series of clear “tiuw” notes.
识别特征
The narrow-billed antwren is 11 to 12 cm (4.3 to 4.7 in) long; one male weighed 8.2 g (0.29 oz). The species is sexually dimorphic and has a longish bill and tail. Adult males are mostly dark gray. Their wings and tail are a darker blackish gray, with white tips on the wing coverts and the outer tail feathers. The center of their throat and breast are black, their flanks white, and their undertail coverts have white bars. Adult females have a pale supercilium and a whitish eye ring. They have olive-brown upperparts with a grayer crown; the olive-brown becomes reddish yellow-brown on the uppertail coverts. Their wings are brown with pale cinnamon edges on the coverts and reddish edges on the flight feathers. Their tail is reddish brown. Their underparts are mostly yellow-ochre that is nearly whitish in the center of the belly; their flanks have some white.
分类信息
The narrow-billed antwren is monotypic.<p>The narrow-billed antwren is not closely related to other members of genus Formicivora. In the early twentieth century some authors placed it in the monotypic genus Neorhopias. More recent studies have revived that suggestion.
- 学名
- Formicivora iheringi
- 命名信息
- Hellmayr, 1909
- 目
- Passeriformes
- 科
- Thamnophilidae
- 属
- Formicivora
分布与栖息地
The narrow-billed antwren has a disjunct distribution inland from the coast in the eastern Brazilian states of Bahia and Minas Gerais. It inhabits the understorey to mid-storey of deciduous forest. In part of Bahia it also occurs in mata-de-cipó, a biome characterized by a relatively open understorey and a few large emergent trees above a dense mid-storey. In elevation it ranges between 250 and 1,100 m (800 and 3,600 ft).
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Chestnut-bellied Rock-Thrush
Monticola rufiventris
An upright bird of montane forests. Male is dark blue above and orange below, with a dark face. Female looks completely different: gray-brown with boldly scaled underparts and a whitish crescent behind the ear. Female White-throated Rock Thrush is similar, but browner, with a spotted back and no pale ear crescent. Usually seen in pairs, perched quietly on a rock or exposed branch at canopy level. Song is a series of buzzy whistles; most common call is a distincive low, harsh scratching noise.
Papyrus Gonolek
Laniarius mufumbiri
Boldly patterned black-and-red bushshrike with a yellow crown and pale eyes. The duller immature has orange underparts and a gray crown. Found in papyrus swamps, where it skulks with great skill. The male gives ringing “chonk” or “chuwee” notes, often in rapid-fire or up-and-down series. The female gives a low ratcheting call which is sometimes given in a duet alongside the male’s vocalizations. Similar to Black-headed Gonolek, but has a yellow crown and a white wingbar.
Dartford Warbler
Curruca undata
Plumage is rather dark overall, grayish above and dull wine-red below; note narrow red eyering and fairly bright yellowish legs. No similar species in most of its range. Skulking and difficult to see well, although when singing in spring may perch atop a bush, the long tail often held slightly cocked. Song is composed of short whistles and harsher rattles; calls are dry and scolding. Breeds in dense scrubby habitats, especially heathland with gorse. Winters in similar habitats, albeit averaging more open and occasionally grassy.
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