Tufted Tit-Spinetail
Leptasthenura platensis
Small, charismatic species with a long spiky tail and a short crest. Has generally pale gray-brown plumage with a streaked throat and crest. Occurs in woodland, scrub, and gallery forests. Forages acrobatically from the understory up to the canopy. The song starts with sharp notes and ends with a very thin trill: “tsi, tsirrrrr.”
识别特征
The tufted tit-spinetail is 15 to 17 cm (5.9 to 6.7 in) long and weighs 10 to 12 g (0.35 to 0.42 oz). It is a small, slender, long-tailed furnariid with a short crest and a short bill. The sexes have the same plumage. Adults have a thin pale supercilium on an otherwise dull grayish brown face. Their crown and crest are dark brown with paler streaks, their back and rump dull grayish brown, and their uppertail coverts a paler grayish brown with a tawny tinge. Their wings are mostly grayish brown with some paler feather edges and tips. Their tail is mostly dark fuscous with some dull rufous at the ends of the outermost feathers; it is graduated and the feathers narrow at the tips giving a spiny appearance. Their throat and upper breast are whitish with faint brownish markings; the rest of their underparts are pale grayish brown with slightly darker flanks and undertail coverts. Their iris is brown, their bill black with a pale base to the mandible, and their legs and feet dark olive-green. Juveniles do not have a crest; they have a less distinctly marked crown and breast than adults and rounded tail feathers.
分类信息
The tufted tit-spinetail is monotypic.
- 学名
- Leptasthenura platensis
- 命名信息
- Reichenbach, 1853
- 目
- Passeriformes
- 科
- Furnariidae
- 属
- Leptasthenura
分布与栖息地
The tufted tit-spinetail is found in northern and central Argentina from Salta Province to Buenos Aires Province, in western Rio Grande do Sul in extreme southern Brazil, and in most of Uruguay. There are only sight records in Paraguay, which leads the South American Classification Committee of the American Ornithological Society to call it hypothetical in that country. It inhabits a variety of landscapes including gallery forest and other riparian zones, arid scrublands, dry woodlands, and brushy areas and Monte Desert near the last. In elevation it ranges from sea level to 1,000 m (3,300 ft).
- 迁徙
- Resident species
行为
The tufted tit-spinetail is mostly a year-round resident throughout its range, though some individuals appear to wander out of the species' core range.<p>The tufted tit-spinetail feeds on arthropods. It forages in pairs or in small groups that may be families, and feeds from the forest's understorey to its canopy. It usually forages by gleaning its prey from foliage, twigs, and the bark of branches. It sometimes hangs upside down to reach prey.<p>The tufted tit-spinetail breeds in the austral spring and summer. It is thought to be monogamous. It builds a cup nest of twigs, grass, feathers, and hair in a cavity. It uses natural cavities, woodpecker holes, and the previous season's nests of other furnariids including the "mud ovens" of horneros. The clutch size is two to four eggs and occasionally up to six. The incubation period is about 14 to 15 days and fledging occurs about 15 or 16 days after hatch. Both parents provision the young.<p>The tufted tit-spinetail's song is "an accelerating, descending trill introduced by distinct sharp notes, 'tsi, tsirrrrr' ". Its most common call is "a series of short notes followed by sharp trill, e.g. 'pit-pit-pit … prrr' ". The call is also described as "tswee tswee tswee tittle-tit ending in a rattle".
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Black-chinned Sparrow
Spizella atrogularis
Long-tailed, pale gray sparrow with contrasting brown back and small pink bill. Face of breeding male looks like it's covered in soot. Reminiscent of Dark-eyed Junco but juncos show prominent white in tail; also note Black-chinned Sparrow's streaked back and brown edges on wing feathers. Prefers shrubby hillsides and slopes with large bushes and rocky outcroppings, from the southwestern U.S. to central Mexico. Song is often likened to a dropped ping-pong ball: an accelerating series of notes, not as clear-toned as Field Sparrow.
Lesser Nighthawk
Chordeiles acutipennis
Long-winged nocturnal bird which catches insects in flight often around dawn and dusk. Found in shrubby open areas. Intricate brown, buffy, and gray patterning with white patches near wingtips. Very similar to Common Nighthawk, best distinguished by the position of white wing patch: closer to wingtip on Lesser, closer to base of wing on Common, but this difference can be very difficult to judge. Also typically paler than Common with more golden buffy tones. During the day, roosts on the ground or on a tree branch.
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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