Swamp Grass Babbler
Laticilla cinerascens
Slender, prinia-like babbler restricted to the Brahmaputra floodplains of far northeastern India and northern Bangladesh. Streaked gray-brown above and white below with faint white eye-arcs and a long tail. Shy, keeping to deep beds of tall grasses, especially elephant grass, on river plains, where it is most easily detected by its fluid warbling song.
识别特征
Swamp grass babblers average 17 cm (6.7 in) long (big for a prinia). Adults are olive-grey above, slightly warmer on the back of the neck and upper back, but less distinctly collared than the rufous-vented grass babbler. Bold dark streaking starts at the forehead and fades on the back. The underparts are greyish white, greyer on the flanks, which may be slightly streaked. There is a faint buff tint to the undertail coverts (but not the distinctive colouring for which the rufous-vented prinia is named). The upper surface of the wings has barring formed by the covert feathers and their paler fringes. The wing linings are a faintly tawny off-white. The flight feathers of the wings are greyish brown; when the wing is folded, the primaries barely extend beyond the tertials. Those of the tail may be greyish or olive-brown and have tawny tips. The tail is long and strongly graduated, that is, the outermost pair of feathers is only one-third as long as the central pair. The head shows a conspicuous white eye-ring, whitish lores, and dark-streaked whitish cheeks.<p>The upper mandible is horn-brown; the lower, straw-brown or flesh-brown. The eyes are brown, varying a little in lightness. The legs are flesh-colored or pale brown.<p>From July to September the plumage is worn, especially the tail, which may be much shorter than in fresh plumage and missing the tawny tips. The moult is usually complete by October.<p>Juveniles are similar but have loose, fluffy plumage. They have little or no streaking on the back and their tail tips are rufous, not tawny. They molt into adult head and body plumage, retaining their flight feathers, about 4 to 6 weeks after fledging.<p>Calls include "a wheezy feez, and a quiet, very rapid nasal rattle." The song is described as a warble about 4 seconds long, liquid and loud, comparable to that of a dunnock.
分类信息
Some authorities lump it as a subspecies, L. burnesii cinerascens, of the rufous-vented grass babbler. Here it is treated as a separate species following the Handbook of the Birds of the World and Clements.
- 学名
- Laticilla cinerascens
- 命名信息
- (Walden, 1874)
- 目
- Passeriformes
- 科
- Pellorneidae
- 属
- Laticilla
分布与栖息地
- 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
Olive-flanked Robin-Chat
Dessonornis anomalus
Dark, compact robin-chat with the least orange of any member of this group. There is considerable geographical variation, but always shows a pale eyebrow and throat, and some rufous on the belly, flanks, rump, and tail. The color of the underparts varies from blackish to white to buff, and the color of the upperparts from black to gray to brown. Some populations show a strongly black-and-orange tail, while others have a tail that is completely rufous. Found in the understory of montane forest. Generally uncommon and skulking. The variable song consists of a mournful, descending series of whistles.
Gray-capped Hemispingus
Kleinothraupis reyi
An active yellow warbler-like tanager with a gray cap and olive green back. Sexes similar. Found in large groups, pairs, and mixed species flocks, carefully examining foliage and branches while foraging at all levels of forest, most often at low levels with bamboo. Common in wet forest at high elevations in Andes. Like other hemispingus species, very vocal while foraging and moving. No other tanager or warbler is yellow with a distinct gray cap. Endemic to the Andes of Venezuela.
Eurasian Treecreeper
Certhia familiaris
An inconspicuous little bird (plumage blends well with bark) of woods, forests, and gardens with larger trees. Usually seen as singles or pairs, creeping along trunks and branches using its tail for support, like a mini-woodpecker. Probes in crevices for insects and spiders, and often spirals up then drops to low on the next tree and spirals up again. In areas where Short-toed Treecreeper also occurs, the two species are often not safely distinguished without considerable experience; look for “uneven steps” on the wing, whiter sides, and slightly shorter bill. Listen for high, thin “tseee”s and trills. Song is a lovely series of falling whistles, typically preceded by short trills and concluded with a flourishing rising whistle.
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