Narrow-tailed Emerald
Chlorostilbon stenurus
Small, compact, short-billed and short-tailed hummingbird with green tail. Male all glittering green; female green above and gray below with dark cheek, white eyeline, and white-tipped tail. Occurs near humid forest borders in highlands (from 1800 m), usually in open areas, gardens, and cultivated areas. Often perched alone near small flowers at low height. Very similar to other emerald species; distinguished from male and female Short-tailed Emerald by having wings and tail the same length when perched; from male Green-tailed Emerald by irregular length tail feathers. Endemic to the Andes and Coastal Cordillera of Venezuela.
识别特征
The male narrow-tailed emerald is 8.5 to 9 cm (3.3 to 3.5 in) long and females 7.5 to 8 cm (3.0 to 3.1 in). The species weighs between 3.2 and 3.6 g (0.11 and 0.13 oz). Males of both subspecies have a short, straight, black bill. Males of the nominate subspecies have shining green forehead and crown, shining grass green upperparts including the uppertail coverts, and iridescent green underparts and flanks. Its tail is forked and dark green; the outer pair of feathers are very small and stiletto shaped. Females have a slightly decurved bill. Nominate females have a dull dark green crown with a bronze tinge and dark green upperparts and uppertail coverts. Their chin is brownish, the throat pale white, and the rest of the underparts a somewhat darker white. Their tail is forked. Its two innermost pairs of feathers are metallic bluish green. The next pair have metallic green bases becoming brown before the white tip. The outermost two pairs have gray bases becoming dark blue before the wide white tip. Males of subspecies C. s. ignotus are very similar to the nominate, but are smaller, more yellowish green above, and have a duller, darker green, tail.
分类信息
The narrow-tailed emerald has two subspecies, the nominate C. s. stenurus and C. s. ignotus. At least one author has suggested that the green-tailed emerald (C. alice) is either a third subspecies or is contained within ignotus.
- 学名
- Chlorostilbon stenurus
- 命名信息
- (Cabanis & Heine, 1860)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Chlorostilbon
分布与栖息地
The nominate subspecies of narrow-tailed emerald is found in the Andes of northwestern Venezuela from Trujillo state west into Colombia's Meta Department. C. s. ignotus is found from the coastal mountains of Venezuela south into Lara state. The species inhabits humid forest, scrublands, and secondary forest between elevations of 1,000 and 3,000 m (3,300 and 9,800 ft).
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
- 种群趋势
- unknown
照片
分布
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