Black-hooded Sunbeam
Aglaeactis pamela
Unique and spectacular hummingbird of the upper humid montane forest in Bolivia. Plumage mostly black, with striking white feathers on breast and a shining blue rump. Occurs to, and sometimes just above, treeline on the east side of the Andes from western Santa Cruz department to La Paz. The only black hummingbird in its range. This species is generally patchily distributed, but can be locally common, especially where flowers are abundant.
识别特征
The black-hooded sunbeam is about 12 cm (4.7 in) long including its 15 mm (0.59 in) straight black bill. Males weigh about 5.2 g (0.18 oz) and females 5.8 g (0.20 oz). The adult male is mostly purplish black, with glittering golden green to bluish green on the lower back and rump and a white tuft in the center of the breast. The tail is rufous with dusky tips to the feathers. Adult females are colored like the male but are duller overall and with less iridescent lower back and rump. Juveniles are somewhat browner than adults, with a reduced breast tuft and an olive cast to the tail.
分类信息
The black-hooded sunbeam is monotypic.
- 学名
- Aglaeactis pamela
- 命名信息
- (d'Orbigny, 1838)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Aglaeactis
分布与栖息地
The black-hooded sunbeam is found only in the Andes of northern Bolivia, mainly in the departments of La Paz and Cochabamba. In elevation it mostly ranges between 2,500 and 4,200 m (8,200 and 13,800 ft) but there are records as low as 1,800 m (5,900 ft). It inhabits cloud forest and humid to semihumid montane scrublands.
- 迁徙
- Vertical migration
行为
The black-hooded sunbeam is believed to be sedentary but might make seasonal elevational movements.<p>The black-hooded sunbeam feeds primarily on nectar; it forages at all levels and clings to flowers to feed rather than hovering. It also feeds on small arthropods.<p>The black-hooded sunbeam's breeding season is thought to span from September to March. Its breeding phenology, nest, and eggs have not been described.<p>Though the black-hooded sunbeam's vocalizations are not well known, it has been reported giving a "high pitched zeet-zeet-zeet", and other calls during antagonistic encounters.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Black-capped Tinamou
Crypturellus atrocapillus
Subtly colorful tinamou of dense habitats in the lowlands and Andean foothills. Almost exclusively found in bamboo thickets, but also occasionally found in dense riverside vegetation and secondary growth, including around agriculture. Rarely seen, but frequently heard throughout the day; it usually gives about one call note per minute, a springy “bwow”. The most helpful visual field mark is its bright orange legs; it also has a black or dark gray cap, and brown plumage with cold gray head and neck, and reddish orange throat.
Tumbes Hummingbird
Thaumasius baeri
A plain hummingbird found in dry forest and scrub in southwestern Ecuador and northwestern Peru. It is dull green with light gray underparts, a white spot behind the eye, and a thick, slightly curved bill. Some birds show very faint spots on the throat. Similar to Spot-throated Hummingbird, but throat markings are much less conspicuous or entirely absent. Ranges are also different; Tumbes Hummingbird is found only on the Pacific side of the Andes and does not reach the Marañon drainage.
Masked Antpitta
Hylopezus auricularis
Medium-sized antpitta of floodplain forest, particularly with palmetto understory, along the confluence of the Ríos Madre de Dios and Bení in the Riberalta area. The only antpitta in range with dark chevrons on underparts or a blue-gray cap. Forages on or near the ground, but generally perches 1-2 m up in the understory or midstory to sing at dawn. Visually distinctive in range, but song deceptively similar to, and perhaps indistinguishable from, local songs of Amazonian Antshrike. Call a more distinctive three to four-part descending whistle.
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