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
The narrow-tailed emerald is generally sedentary but locally makes seasonal elevational changes.<p>The narrow-tailed emerald forages for nectar by trap-lining in fairly open areas, visiting a circuit of a variety of flowering plants such as Ericaceae, Rubiaceae, Heliconiaceae, Gesneriaceae, and Inga. It generally forages low, between 0.6 and 4 m (2 and 10 ft) above the ground. It captures small insects by hawking from a perch.<p>The narrow-tailed emerald's breeding season spans from September to November. It builds a cup nest of moss with lichen on the outside and typically places it in a shrub or tree between 1 and 2 m (3 and 7 ft) above the ground. The female incubates the clutch of two eggs for 15 to 16 days and fledging occurs about 20 days after hatch.<p>As of mid-2022, neither the Cornell Lab of Ornithology's Macaulay Library nor xeno-canto have recordings of the narrow-tailed emerald's vocalizations.
保护状况
- 种群趋势
- unknown
照片
分布
其他鸟类
Horned Guan
Oreophasis derbianus
Large, long-tailed game bird restricted to undisturbed humid evergreen forest on a few high mountains in Guatemala and adjacent southern Chiapas, Mexico; very rare and local. Mainly found singly in forest canopy, where can be easily overlooked. Unmistakable: black and white overall with red horn on top of head and piercing whitish eyes.
Arnot's Chat
Myrmecocichla arnotti
Chunky black chat with a huge white wing patch. The male has a white cap, and the female a messy white throat patch. Found mainly in miombo and mopane broadleaved woodland, and locally in bushy country and villages. Exuberant song is a fast series of clucks, whistles, and rattles. There is little range overlap with other black chats.
New Zealand Falcon
Falco novaeseelandiae
A compact raptor endemic to New Zealand, with streaky cream-and-brown breast and reddish-brown undertail. In flight, note rapid beating of long pointed wings, and long rounded tail shape while gliding. Females are much larger than males. Widely distributed throughout New Zealand in native and exotic forest, as well as in tussock grassland and farmland. Will aggressively dive-bomb intruders close to nesting sites. Distinctive “kek-kek-kek” call given during attacks. Similar to Swamp Harrier but smaller; rarely feeds on road kill, actively chases prey, and glides with wings set flat rather than a shallow “V” shape like the Swamp Harrier.
开始您的观鸟之旅
在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。