Stripe-backed Antbird
Myrmorchilus strigilatus
Long-tailed antbird with brown- and black-streaked upperparts. Note the white eyebrow contrasting with the black eye-line. Males have a black throat and upper breast, while females have a whitish throat and light streaks on the breast. Forages mostly on the ground and sometimes in the understory of dry forest and scrub. Song starts with 1-2 whistles and continues with a series of fast descending notes.
识别特征
The stripe-backed antbird is 15 to 16 cm (5.9 to 6.3 in) long and weighs 23 to 26 g (0.81 to 0.92 oz). Adult males of the nominate subspecies have a white supercilium and a dark line through the eye on an otherwise buffy face. Their crown, neck, and back are rufous with black streaks; their rump and uppertail coverts are plain rufous. Their central tail feathers are rufous and the outer ones black with white outer edges and tips. Their wings are black with some rufous on the edges of the flight feathers; their wing coverts are black with white tips. Their throat and breast are black. The rest of their underparts are white with black spots on the sides and flanks and a buff tinge to the crissum. Adult females have a buff throat, breast, and belly with darker streaks on the sides and breast. Males of subspecies M. s. suspicax have a buff supercilium, flanks, and crissum; females have a brownish supercilium and deeper buff flanks and crissum than the nominate.
分类信息
The genus Myrmorchilus was erected by the American ornithologist Robert Ridgway in 1909. The stripe-backed antbird is the only member of the genus. It has two subspecies, the nominate M. s. strigilatus (Wied, 1831) and M. s. suspicax (Wetmore, 1922).
- 学名
- Myrmorchilus strigilatus
- 命名信息
- (Wied-Neuwied, M, 1831)
- 目
- Passeriformes
- 科
- Thamnophilidae
- 属
- Myrmorchilus
分布与栖息地
The stripe-backed antbird has a disjunct distribution. The nominate subspecies is found in northeastern Brazil in an area roughtly bounded by eastern Piauí, Rio Grande do Norte, and northern Minas Gerais. Subspecies M. s. suspicax is found in the western parts of Brazil's Mato Grosso and Mato Grosso do Sul states, in southeastern Bolivia, in western Paraguay, and in northern Argentina as far south as Santa Fe Province.<p>The nominate subspecies primarily inhabits caatinga woodlands and scrublands. Subspecies M. s. suspicax primarily inhabits the woodlands and scrublands of the Gran Chaco. In both ecozones it favors areas with dense ground cover. In elevation it ranges up to about 1,100 m (3,600 ft).
- 迁徙
- Resident species
行为
The stripe-backed antbird is believed to be a year-round resident throughout its range.<p>The stripe-backed antbird feeds on arthropods, especially insects. It typically forages singly or in pairs, and mostly on the ground under dense vegetation though it will feed as high as 2 m (7 ft) above the ground. It picks through leaf litter and terrestrial bromeliads, reaches up to glean from foliage, and sometimes jumps to glean from higher leaves, branches, and vines.<p>The two known stripe-backed antbird nests were open cups of dry grass on the ground; both contained two eggs. Nothing else is known about the species' breeding biology.<p>The two subspecies of the stripe-backed antbird appear to have the same song. It is a "[v]ery/extr. high, sharp 'sreet-soweét' " that is sometimes followed by a "strident, slightly descending 'sreet-sreet-sreet-sruw-sruw' ". The species' call is "a long...whistle, entirely downslurred or slightly rising and falling".
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Lesser Frigatebird
Fregata ariel
The smallest of the frigatebirds, but note that the female is larger than the male. Adults are easier to identify than younger birds. Adult males are almost entirely black with a red throat and white spurs emanating outwards from the body onto the wing. Adult females have a black belly and throat, a white breast and hind collar, with similar white spurs on their sides. Juvenile and immature plumages are variable and are best separated from other frigatebirds by size when comparison is possible. Mostly silent except while breeding in oceanic islands. Strongly pelagic during non-breeding season but wind-blown or fatigued birds can be found from continental coasts.
Rufous-bellied Bush-Tyrant
Myiotheretes fuscorufus
Subtly patterned reddish-brown flycatcher of high-elevation montane forests. Perches upright, often on the tops of snags or bushes around forest edges and clearings. Grayish brown above, warm tawny reddish below, with reddish wingbars and a weak black eye-line. Listen for a series of short bouncing notes followed by a punctuated ending note: “pip-pip-pip, pi-PEW.”
Chestnut-winged Cinclodes
Cinclodes albidiventris
This species occurs from western Venezuela to extreme northern Peru. It is fairly common in high elevation grasslands or open shrubby areas with patches of bare ground. Look for a medium-sized, chunky brown bird with a bold whitish eyebrow and throat. In flight, shows an obvious buffy wing stripe. Singles or pairs forage in the open and are often quite approachable. Compare with Stout-billed Cinclodes, which as you may have deduced from the name has a notably stouter (and more curved) bill. Chestnut-winged was formerly a member of the Bar-winged Cinclodes complex, which has since been split into three species.
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