Slender-tailed Woodstar
Microstilbon burmeisteri
Small, long-tailed hummingbird of NW Argentina and the Bolivian Andes. Prefers humid and semi-humid middle elevation forests, but generally rare and difficult to find throughout its distribution. Told from White-bellied Woodstar by Slender-tailed’s longer tail, accentuated sides to gorget, and, on females, largely orangey underparts.
识别特征
The slender-tailed woodstar is 7 to 9 cm (2.8 to 3.5 in) long including its 3 cm (1.2 in) tail. Both sexes have a short, straight, black bill, bronzy green upperparts, and a thin white stripe behind the eye. Males have a reddish purple gorget that flares to the side as "moustache" tufts. The rest of the throat is white, the underparts pale grayish with green mottling on the sides, and the undertail coverts are pale cinnamon. The very narrow forked tail is black. Females have darker cheeks than the male. They do not have the colorful gorget; their underparts are cinnamon-buff. Their central tail feathers are green and the rest cinnamon with a black band near the end.
分类信息
The slender-tailed woodstar was at one time placed in genus Chaetocercus but was restored to genus Microstilbon by the mid 20th century. The species is the only one in its genus and has no subspecies.
- 学名
- Microstilbon burmeisteri
- 命名信息
- (Sclater, PL, 1888)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Microstilbon
分布与栖息地
The slender-tailed woodstar is found from Bolivia's Cochabamba and Santa Cruz departments south into Argentina's Jujuy, Salta, and Tucumán provinces. There is one historical record from the more northern La Paz, Bolivia area. It inhabits deciduous woodland, shrubby areas, thorn scrub, and densely vegetated ravines. In elevation it ranges between 1,100 and 2,600 m (3,600 and 8,500 ft).
- 迁徙
- Resident species
行为
Though details are lacking, the slender-tailed woodstar is strongly suspected of making seasonal elevational movements and might even be an austral migrant.<p>The slender-tailed woodstar forages fairly high in the vegetation, where its fast wingbeats resemble a bumblebee's. Other hummingbirds dominate it. It has been recorded feeding on nectar from epiphyte flowers and is assumed to nectar at other types of plants and to eat insects.<p>The few records of slender-tailed woodstar nests suggest a breeding season that includes December and January. One nest was a cup made of soft plant fibers covered with lichens, attached to a tree branch with spiderweb about 6 m (20 ft) above the ground. The incubation length and time to fledging are not known.<p>Few of the slender-tailed woodstar's vocalizations are known. It does make "a series of dull 'chip' notes" while feeding and hovering.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Eurasian Nuthatch
Sitta europaea
Classic nuthatch, with a long pointed bill, short tail, and black mask; color of underparts varies across range, from peachy-buff to snow-white and orangish. Usually seen as singles or pairs, hitching along trunks and larger branches in deciduous and mixed woodlands and gardens, or visiting bird feeders. Acts a bit like a mini-woodpecker, but does not use its tail for support and sometimes goes downwards head-first. Often feeds in the canopy, but also feeds on the ground where seeds have fallen. Easily overlooked until rather loud ringing calls are learned. Compare with other nuthatches where ranges overlap.
Archbold's Bowerbird
Archboldia papuensis
Large, rare bowerbird of montane forest. Males are black with a long, forked tale and yellow crest, spikey at the front and flat at the back. The female is dark gray with the hint of a crest, shorter, squared tail and a small rufous patch in the wing. Honeyeaters and Short-tailed Paradigalla have facial wattles. Other black birds in range are much smaller. Very varied vocalizations. Many different rough, scolding calls and male gives a distinctive, snap and yelp at the bower.
Scottish Crossbill
Loxia scotica
Crossed bill tips give crossbills their name. Only found in pine forests of Scotland, where uncommon and local. As a rule, not safely identified in the field because it looks intermediate between smaller-billed Common (Red) Crossbill and bigger-billed Parrot Crossbill (both of which can occur in same areas). With experience (and computer analysis!), may be identified by voice. Like other crossbills, found in pairs or flocks feeding quietly on pine cones or calling excitedly before taking off in wide-ranging, bounding flight. Male plumage reddish overall; female grayish green overall, with brighter rump.
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