Sincora Antwren
Formicivora grantsaui
Range-restricted antwren of the Serra do Sincorá. Males are brown above and black below, with a white eye-line that stretches down to the underparts. Females have black underparts streaked with white. Found in low scrub and grasslands in rocky areas. The song is a continuous repetition of high, slow “tjew” notes. The similar but more widespread Rusty-backed Antwren has a rufous back and a different song.
识别特征
The Sincora antwren is 12 to 13 cm (4.7 to 5.1 in) long and weighs 8.5 to 11.5 g (0.30 to 0.41 oz). Adult males have a white supercilium that extends down the neck and along the sides of the breast and belly. Their crown and upperparts are generally deep brown; the color is grayer on the forehead and brighter on the mantle and scapulars. Their wing coverts are black with white spots on the ends and their flight feathers are dark brownish gray with thin brown outer edges. Their tail feathers are gray and black with narrow white tips on the central ones and wide white tips on the rest. Their face, throat, and underparts are black with deep brown flanks and gray and white underwing coverts. Adult females have a paler brown crown and back than males. They have a thin black band through the eye and their face, throat, and breast are whitish with wide black streaks. Both sexes have a dark brown iris, bare grayish black skin around the eye, dark plumbeous gray legs, and dark plumbeous gray feet with yellow soles. Males have a black bill; females have a black bill with a bluish gray base.
分类信息
The Sincora antwren was first described in 2007 from specimens collected near the small town of Mucugê in the state of Bahia, eastern Brazil. The specific epithet commemorates the German-born naturalist Rolf Grantsau who had collected a specimen in 1965. Coincidentally, another species was also described from the same region in 2007, the Diamantina tapaculo (Scytalopus diamantinensis).<p>The Sincora antwren is monotypic.
- 学名
- Formicivora grantsaui
- 命名信息
- Gonzaga, Carvalhaes & Buzzetti, 2007
- 目
- Passeriformes
- 科
- Thamnophilidae
- 属
- Formicivora
分布与栖息地
The Sincora antwren is found in the Serra do Sincorá, part of the Espinhaço Mountains located at the eastern edge of the Chapada Diamantina region of Brazil's Bahia state. It inhabits campo rupestre, a biome characterized by scrub and grasses on poor soil among rocky outcrops, which in the Chapada Diamantina are sandstone. In elevation it ranges between 850 and 1,100 m (2,800 and 3,600 ft).
- 迁徙
- Resident species
行为
The Sincora antwren is believed to be a year-round resident throughout its range.<p>The Sincora antwren's diet and foraging behavior are not known but are assumed to be similar to those of others of its genus. They feed on arthropods, usually in pairs or family groups.<p>Nothing is known about the Sincora antwren's breeding biology.<p>The Sincora antwren's song is a "slow (2 notes/sec) series of very short, very high 'tjew' notes". It has "a distinctive two-part alarm call containing more than 2 (rarely only 2) notes".
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Wallace's Hawk-Eagle
Nisaetus nanus
Typical small hawk-eagle. Small upright crest visible when perched. Adult has dark brown wings and a paler face. In flight, look for densely black-barred underparts, two white bands across the tail, and light brown on the inner part of the underwing (compared with the completely black-and-white underwings of Blyth’s Hawk-Eagle). Visibly smaller than both Blyth’s and Mountain hawk-eagles. Juvenile Wallace’s is pale tawny-brown on the head and on the underparts; the similar Blyth’s Hawk-Eagle has tail barring. Jerdon’s Baza can appear similar, but it has horizontal banding across the breast, whereas juvenile Wallace’s has unmarked underparts, pantaloons (fully feathered legs), and a broader black tip to the tail. Wallace’s Hawk-Eagle is often seen in flight over or perched on a snag in lowland forests and forest edges.
Rufous Chatterer
Argya rubiginosa
An unusual slim babbler with a long tail. Brown on the upperparts and rufous on the underparts, with a pale eye and bill and a finely streaked crown. Found in woodland and savanna in areas with thick undergrowth, almost always in small groups. Somewhat similar to other babblers, especially Scaly Chatterer, but has much more rufous underparts. The vocalizations include a variety of dry notes, scolds, and mews, usually given in chorus by a whole group.
Hook-billed Vanga
Vanga curvirostris
Big black-and-white vanga with a strong hooked bill. Madagascar endemic that uses all types of forest, and some plantations and scrub. Seen mostly in the mid-story, singly or in pairs. A serious predator that will grab just about any other animal that it can manage to swallow. Perhaps for that reason, doesn’t often join mixed flocks, and is often mobbed by smaller birds. Song is a long, ghostly whistle. Distinctive pattern, particularly black-and-white wing markings, unlike any other vanga.
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