Black-backed Antshrike
Thamnophilus melanonotus
A short-crested antshrike with a heavy bill and bold wing markings, found along coastal slope of northern Colombia and Venezuela. Male is mostly black with white flanks and wing and tail markings. Female is dull buff colored with a dusky spotted crown, dark wings with buffy markings, rufous tail, and a prominent buffy eyering. Locally common but hard to see in dense vine tangles in dry forest and shrubby areas. Territorial, mostly in pairs in the understory to mid-levels of the forest. Best found by voice, a nasal and harsh “kuarrrr!” repeated every two seconds. Similar to Black-crested Antshrike, but that species has a much more prominent crest, and the female has black wings and rufous crown.
识别特征
The black-backed antshrike is 15 to 16 cm (5.9 to 6.3 in) long. Members of genus Thamnophilus are largish members of the antbird family; all have stout bills with a hook like those of true shrikes. Adult males have a black to blackish brown head and back with white edges on the scapulars and a hidden white patch between them. Their lower back and rump are light gray. Their wings are black with wide white tips on the coverts and white edges on the flight feathers. Their tail is black with white tips on the feathers and white edges on the outermost pair. Their throat and breast are black and their flanks, belly, and crissum are white. Adult females have a dark brown crown with cinnamon edges to the feathers. Their face is buff. Their upperparts are brown with dark centers to the feathers. Their wings and wing coverts are brownish black with pale buff edges and tips. Their tail is rufous-brown with whitish tips and edges to the feathers. Their underparts are buff that is somewhat whiter on the belly. Subadult males resemble adult females with some black feathers beginning to show.
分类信息
The black-backed antshrike was described by the English zoologist Philip Sclater in 1855 and given the binomial name Thamnophilus melanonotus. It was subsequently placed in the genus Sakesphorus. A molecular phylogenetic study published in 2007 found that Sakesphorus was polyphyletic and that three species including the black-backed antshrike were embedded within a clade containing members of Thamnophilus. The black-backed antshrike was therefore moved back to its original genus. <p>The black-backed antshrike is monotypic.
- 学名
- Thamnophilus melanonotus
- 命名信息
- Sclater, PL, 1855
- 目
- Passeriformes
- 科
- Thamnophilidae
- 属
- Thamnophilus
分布与栖息地
The black-backed antshrike has a disjunct distribution. It is found on the Caribbean slope from northern Colombia as far south as northern Bolívar Department and east into northwestern Venezuela as far as Miranda state. A second population is found in the Zulia River valley in Colombia's Norte de Santander Department and the adjacent Cordillera de Mérida in western Venezuela. The species inhabits the understorey to mid-storey of dry deciduous forest, where it favors areas with dense vine thickets. In elevation it ranges from sea level to 1,000 m (3,300 ft) in Colombia and to 1,300 m (4,300 ft) in Venezuela, though in the latter country it is mostly found below 500 m (1,600 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
Little Sparrowhawk
Tachyspiza minulla
A tiny, secretive and inconspicuous hawk that flies quickly and nimbly within woodland thickets and forest while hunting small birds, other vertebrates, and insects. It has a very distinctive white rump and two pale spots on the upper tail. Call is a distinctive high-pitched bisyllabic, down-and-upslurred “chy-lip”. Similarly-plumaged African Goshawk is much larger; Red-thighed Sparrowhawk is similar in size but prefers dense rainforest, is more rufous below, and generally lacks barring on the underside.
Cinnamon-bellied Imperial-Pigeon
Ducula basilica
A distinctive large pigeon with a pale pink head and neck, a deep cinnamon belly, dark greenish upperparts and tail, and a broad pale band at the tail tip. Singles to small groups inhabit forest and forest edge, including degraded forest and plantations. Perches high, but rarely in the open. Overlaps with Spectacled Imperial-Pigeon, but differs in its pink head, its lack of a bold eye-ring, its cinnamon belly, and its pale tail band. Gives a signature deep two-note growl, “ku-woooo,” with a curt, rising first note and a longer second note.
Large-tailed Antshrike
Mackenziaena leachii
Medium-sized antshrike with a rather small head, a short robust bill, and a long tail. Males are black with white spots and an entirely black tail while females are black with cinnamon spots and barring throughout. Mostly seen in pairs in the dense understory of humid forests closer to bamboo, can be active but hard to see. The song is a loud and clear series of ascending and descending notes.
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