Yellow-crowned Gonolek
Laniarius barbarus
A striking black-and-crimson bushshrike with a yellow-orange crown. Juvenile is duller, browner above and yellowish underneath. Singles and pairs forage alone or sometimes in mixed-species flocks in moist or dry savanna using dense tangles, where it prefers thicker trunks but will also hop on the open ground; also uses coastal scrub and mangroves. Calls are variable, but mostly comprise loud ringing whistles answered by clicks, electric buzzing, and grating notes in a synchronized duet.
识别特征
The yellow-crowned gonolek is 22 cm (8.7 in) long with a long tail and short wings. The adult is a vividly-coloured bird, although easily overlooked as it lurks in undergrowth. It has solidly black upper parts apart from its golden crown, and scarlet underparts other than a buff-yellow undertail. The legs are dark. Sexes are similar, but juveniles are paler and duller.
分类信息
In 1760 the French zoologist Mathurin Jacques Brisson included a description of the yellow-crowned gonolek in his Ornithologie based on a specimen collected in Senegal. He used the French name La pie-griesche rouge du Sénégal and the Latin Lanius Senegalensis ruber. Although Brisson coined Latin names, these do not conform to the binomial system and are not recognised by the International Commission on Zoological Nomenclature. When in 1766 the Swedish naturalist Carl Linnaeus updated his Systema Naturae for the twelfth edition, he added 240 species that had been previously described by Brisson. One of these was the yellow-crowned gonolek. Linnaeus included a brief description, coined the binomial name Lanius barbarus and cited Brisson's work. The species is now placed in the genus Laniarius that was introduced by the French ornithologist Louis Pierre Vieillot in 1816. Two subspecies are recognised.
- 学名
- Laniarius barbarus
- 命名信息
- (Linnaeus, 1766)
- 目
- Passeriformes
- 科
- Malaconotidae
- 属
- Laniarius
分布与栖息地
- 迁徙
- Resident species
行为
This species is seldom seen because it inhabits thick undergrowth from which its calls can be heard. These include whistles and rattles, often sung in duet, with a fluted too-lioo overlapped by a rattling ch-chacha. The yellow-crowned gonolek feeds mainly on insects located in bushes or on the ground. The diet consists mostly of beetles and caterpillars, but birds eggs and nestlings are sometimes taken.<p>It is monogamous and territorial. Some courtship behaviours have been observed with a pair chasing each other through a bush, leaping from branch to branch and emitting metallic twanging sounds. The deep cup-shaped nest is often flimsy and is built in a bush, from rootlets and tendrils. Two, or occasionally three, greyish-green or bluish-green eggs with dark spots are laid.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Bates's Sunbird
Cinnyris batesi
A very small nondescript sunbird with a short orange-based bill that curves uniformly along its length; easily mistaken for females of other sunbirds. The only features on the olive upperparts are indistinct paler eyebrows and lines running under the eyes, and yellow edging to the wings. Although often hidden, the male has yellow or whitish (not red) tufts at the shoulders. Singles are local and inconspicuous at the edges of lowland and riverine forest, sometimes entering secondary growth; it joins mixed-flocks and is frequently attracted to epiphytes in mossy clumps. Calls a high-pitched “tseeep” and trills. Little Green and Fraser’s sunbirds are similar to Bates’s but brighter, with straighter bills and more distinct yellowish eye-rings; Ursula’s Sunbird has a long decurved bill and grayish face and underparts.
Blue-gray Robin
Melanodryas cyanus
A fairly small bird of montane forest. Blue-gray plumage, with contrasting blackish wings and tail. Perches low down, often on diagonal branches or vertical mossy trunks, flicking its tail and scanning the ground for insects. Very similar to Smoky Robin, but Blue-gray has a distinct bluish tinge to the gray, lacks the paler belly and has more contrasting black wing feathers. Several different vocalizations, including mournful, monotonous whistles, an up-and-down, whistled jumble and a rasp.
Mekong Wagtail
Motacilla samveasnae
Large black-and-white wagtail with an intricately and uniquely striped head pattern. Wings and outer tail feathers flash brightly in flight. Adult male is black-backed, while the female and immature have a duller gray-brown back. Simple song is a compilation of a few high phrases of whistles and twitters. Call is harsh and buzzy. Found only around flowing lowland rivers with braided rocky sections, specifically a unique composite of gravel and sand bars with low vegetation and boulders.
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