Western Long-tailed Hornbill
Horizocerus albocristatus
A small-bodied hornbill with an extremely long tail, a dark bill, and an almost entirely white head with a unique crest. Usually found in thick rainforest, where it can be difficult to view. At times, these birds will follow troops of monkeys to eat animals they scare out of the foliage. Vocalizations are unique among African hornbills, including crowlike caws and long mournful wails. Calls can be similar to those of Congo Serpent-Eagle, but White-crested Hornbill often gives more of a wail with a somewhat raspy quality.
分类信息
The western long-tailed hornbill was formally described in 1848 by the American ornithologist John Cassin based on a specimen that had been collected near the Saint Paul River in Liberia. He coined the binomial name Buceros albocristatus. The specific epithet combines the Latin albus meaning "white" with cristatus meaning "crested" or "plumed". The species is now placed in the genus Horizocerus that was introduced in 1899 by the American ornithologist Harry C. Oberholser. The western long-tailed hornbill was formerly considered to be conspecific with the eastern long-tailed hornbill (Horizocerus cassini) with the English name "white-crested hornbill".<p>There are two subspecies, which differ primarily in the amount of white to their head and neck and the presence or absence of white tips to the wing-coverts:
- 学名
- Horizocerus albocristatus
- 命名信息
- (Cassin, 1848)
- 目
- Bucerotiformes
- 科
- Bucerotidae
- 属
- Horizocerus
分布与栖息地
The western long-tailed hornbill has a large range in West Africa, occurring from southern Sierra Leone, east to Benin including Côte d'Ivoire, Ghana, Guinea, Liberia, and Togo. It is frequent in parts of its range. Although its population is difficult to estimate, it is not thought to be threatened.
- 迁徙
- Resident species
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
East Andean Antbird
Drymophila caudata
Slender, long-tailed antbird restricted to Colombia’s eastern Andes. Note the profuse streaking on foreparts and the orange belly and rump. Male’s streaks are darker and more contrasting than female’s. Similar to Klages's Antbird (little or no overlap), but central underparts are streaked instead of plain. Also very similar to Streak-headed Antbird and Santa Marta Antbird, but no range overlap. Inhabits bamboo thickets in cloud forest. Song consists of a few clucking notes followed by several rasps.
Rufous-breasted Chat-Tyrant
Ochthoeca rufipectoralis
Small flycatcher found in the upper subtropical and temperate zones of the Andes from Venezuela to Bolivia. Like most chat-tyrants, has a very bold eyebrow. Look for the conspicuous rufous band on its chest and one rufous wingbar. Sexes similar. Fairly common and easy to see. Found singly or in pairs in middle levels of open woodland and edge.
Kolombangara White-eye
Zosterops murphyi
Small. Entirely plain yellowish-olive with a very broad white eye-ring. Restricted to mossy cloud forest, mostly above 950 meters of elevation, but has been recorded down to 350 meters of elevation. Overlaps with Solomons White-eye but has a much broader white eye-ring and is more uniformly olive-green. Song is a long high-pitched warble. Common call is a sharp piercing “peep,” quite different from that of Solomons White-eye.
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