Bolivian Slaty-Antshrike
Thamnophilus sticturus
Small antshrike. Males are mostly gray, with a black crown and white-spotted black wings and tail. Females are mostly rusty-colored, with whitish underparts. Note the pale eyes, which help to differentiate this species from similar slaty-antshrikes. Found in semideciduous forests with dense vine tangles and adjacent second growth. Forages from the understory to middle levels and apparently does not accompany mixed-species flocks. The song is a series of nasal notes ending with a rattle.
识别特征
The Bolivian slaty antshrike is about 14 cm (5.5 in) long and weighs 18 to 20 g (0.63 to 0.71 oz). Members of genus Thamnophilus are largish members of the antbird family; all have stout bills with a hook like those of true shrikes. This species exhibits significant sexual dimorphism. Adult males have a gray forehead and a black crown. Their back is gray with a few black spots and a hidden white patch between their scapulars. Their face is gray. Their wings, scapulars, and wing coverts are black with white spots and edges. Their tail is black with white tips and spots on the feathers. Their underparts are light gray with much white on the belly. Adult females have a bright reddish-brown crown and yellowish olive-brown upperparts. Their wings are dark brown with white spots and edges on the scapulars and pale buff edges on the flight feathers. Their tail is dark brown with white tips and spots on the feathers. Their underparts are white in the center and light yellowish brown across the breast and on the sides, flanks, and crissum.
分类信息
The Bolivian slaty antshrike was described by the Austrian ornithologist August von Pelzeln in 1868 and given its current binomial name Thamnophilus sticturus. It was later treated as a subspecies of T. punctatus, which was then called the slaty antshrike. Following the results of a study published in 1997, the slaty antshrike was split into six species, of which the Bolivian slaty antshrike is one. To avoid confusion the remnant T. punctatus was given its present name of northern slaty antshrike.<p>The Bolivian slaty antshrike is monotypic.
- 学名
- Thamnophilus sticturus
- 命名信息
- Pelzeln, 1868
- 目
- Passeriformes
- 科
- Thamnophilidae
- 属
- Thamnophilus
分布与栖息地
The Bolivian slaty antshrike is found in the central Bolivian departments of Beni, Cochabamba, and Santa Cruz, in adjoining extreme western parts of the Brazilian the states of Mato Grosso and Mato Grosso do Sul, and in far northern Paraguay's Alto Paraguay department. It inhabits the understorey to mid-storey of dry semi-deciduous forest, gallery forest, larger areas of more humid forest, and secondary forest. In elevation it reaches 600 m (2,000 ft) in Brazil and 950 m (3,100 ft) in Bolivia.
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
- 种群趋势
- unknown
照片
分布
鸟叫声
其他鸟类
Banded Lapwing
Vanellus tricolor
Elegant lapwing with a white stripe through eye (like a sunglass strap), a red wattle in front of the eye, and a thick and complete black breast-band. Smaller and shorter-legged than Masked Lapwing. Not generally an urban bird, it is more common inland. In more coastal areas it tends to be limited to areas with very short grass (e.g., airports, turf farms).
St. Helena Plover
Anarhynchus sanctaehelenae
A long-legged plover with a long black bill, a black eye mask and crown, and a white forehead. Upperparts brownish, and underparts whitish washed with peachy orange. Widespread across flat open upland habitats to above 500 meters of elevation. Very similar to Kittlitz’s Plover, but ranges do not overlap. Most common call is a short soft “kee-vit.” Gives a more rattling trill in flight.
Rufous-tailed Flatbill
Ramphotrigon ruficauda
Smallish flycatcher, characteristic of forests on sandy soils and seasonally flooded forests. Heard more often than seen. Best told by bright rufous tail and flight feather edges contrasting with greenish-brown body. Singles or pairs inhabit the mid-story of tall forest and typically do not associate with other species. Sits upright and sallies to foliage for insects. In western Amazonia, told from Dusky-tailed Flatbill by clearer (less mottled) breast and extensive rufous in wings and tail. Voice is a single, lazy whistle, with characteristic strong inflection in the middle.
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