Dusky Antbird
Cercomacroides tyrannina
This skulking species lives in humid tropical lowlands, favoring thickets and tangles at forest edges and along streams. Often heard song of piping whistles usually reveals the presence of Dusky Antbirds, which usually occur in pairs but are difficult to see clearly. Male is slaty gray overall with narrow whitish wingbars. Female has a rusty “blank” face and rusty underparts.
分类信息
The dusky antbird was described by the English zoologist Philip Sclater in 1855 and given the binomial name Pyriglena tyrannina. The species was subsequently placed in the genus Cercomacra but a molecular phylogenetic study published in 2014 found that Cercomacra, as then defined, was polyphyletic. The genus was split to create two monophyletic genera and six species including the dusky antbird were moved to the newly erected genus Cercomacroides.
- 学名
- Cercomacroides tyrannina
- 命名信息
- (Sclater, PL, 1855)
- 目
- Passeriformes
- 科
- Thamnophilidae
- 属
- Cercomacroides
分布与栖息地
This is a common bird in the understory thickets of wet forest, especially at edges and clearings, and in adjacent tall second growth. The female lays two reddish-brown-spotted white eggs, which are incubated by both sexes, in a small, deep, plant fibre and dead leaf cup nest, which is suspended from the fork of a thin branch or vine low in a tree. The male and female parents both feed the chicks.<p>The dusky antbird is typically 14.5 cm long, and weighs 18 g. The adult male is mainly blackish-grey above and paler grey below, with two white wing bars. The female has brown upperparts and rufous-cinnamon underparts. Young birds, especially males, are darker than the adults. Exact plumage shades vary geographically, since there are a number of subspecies of this antbird.<p>This species has a whistled kick call, and the song is a duet, the male's ascending whistle pu pu pe pi pi answered by the female's softer, jerky juu-ut juu-ut juu-ut juu-ut juu-ut .<p>The dusky antbird is normally found as pairs throughout the year and does not join mixed-species feeding flocks. It feeds on insects and other arthropods taken from twigs and foliage in thickets or vine tangles. It is easier to hear than see in its dense habitat.
- 迁徙
- Resident species
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Gray-crowned Palm-Tanager
Phaenicophilus poliocephalus
A woodland species that also ventures into parks and gardens. Often found in groups of up to five foraging at middle to upper heights and uncommonly joins mixed-species flocks. Note this species’ black cheek, which is bordered below by broad white moustache stripes and above by a gray crown. The similar Black-crowned Palm-Tanager has an entirely white throat and a black crown. Vocalizations are poorly known, but include a high thin “tseeoo” that is briefer than similar note of Black-crowned.
White-chinned Petrel
Procellaria aequinoctialis
Common, rather large dark petrel of the Southern Ocean; regular migrant north into Humboldt Current. Usually looks wholly blackish with a pale, ivory-colored bill—the white chin is often just a few feathers and frequently is difficult to see in the field, although it can be more extensive, especially on Atlantic and Indian Ocean birds. White-chinned is obviously larger than dark-billed Sooty Shearwater and much smaller than giant-petrels, which have huge pale bills. Pale bill tip distinguishes White-chinned from similar Westland and Parkinson’s Petrels, which have dark bill tip.
South American Painted-Snipe
Nycticryphes semicollaris
Distinctive and attractive, but a rarely seen denizen of fresh and brackish wetlands, especially with shallow water and low to knee-high grasses; also found on lakeshores with taller reeds and rushes. Occasionally seen feeding quietly at edge of vegetation, but mostly seen when flushed from close range. Flies up silently with stiff flicking wingbeats and brief glides, long legs trailing, and drops back to cover usually not far away. Note bold white spots on wings and droop-tipped bill. Related to jacanas, not closely related to the typical snipe.
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