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
White-browed Wagtail
Motacilla maderaspatensis
A rather largish wagtail and the only resident amongst this group. It has black head, back, and upper tail, and white underparts. The broad white eyebrow that extends from the base of the bill to the back of its head is a characteristic. A broad white bar on the wing is visible when sitting and in flight. Female is usually duller black than the male, while immatures have a shorter eyebrow with black areas replaced by grayish-brown and have dirty white underparts. Very vocal; gives a loud 3–4 noted whistle and a “psi-sit” flight call. Mostly seen in pairs or family parties, near wet areas of any kind including small pools in lawns and buildings, running around wagging its tail and flying with a characteristic undulating flight.
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A slender tern with a short bill. Breeding adults are dark-capped with an ashy-gray body, a strongly contrasting white cheek stripe and rump, and a reddish bill and legs. In flight, underwings and uppertail are mostly grayish. In non-breeding plumage resembles other non-breeding terns, but note structure. Restricted to a handful of subantarctic islands, where it forages in inshore waters; common on Kerguelen and uncommon on Crozet and Marion. In breeding plumage, the larger Antarctic Tern is paler gray than Kerguelen, with a larger bill and whitish (not grayish) uppertail and underwings. Arctic Terns (in non-breeding plumage) only overlap with Kerguelen Terns (in breeding plumage) in austral summer.
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Aplonis cantoroides
Large songbird of New Guinea and Solomon Islands, also on Boigu Island in the northern Torres Strait. Adult glossy black with strong metallic green/blue sheen and bright red eye. Tail has blunt square tip. Juvenile brown above, pale below, with heavy short brown streaks. Compare Spangled Drongo, which has heavy, flared, forked tail, and Metallic Starling, which has long, tapered, pointed tail.
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