Black-crowned Tchagra
Tchagra senegalus
A gray-brown bushshrike with rufous wings, a bold pale eyebrow, and a diagnostic all-black crown; most races have a distinctive gray belly. Pairs occasionally join mixed-species flocks and skulk in a variety of scrub, tangled thickets, and open woodland, foraging for insects on the ground or in the lower levels of vegetation. The species sings a wonderful melodious up-and-down whistled “whee-cheee-chooo-cheeera” and a variety of other whistles and grating sounds.
识别特征
The black-crowned tchagra is a colourful and unmistakable species, 19–22 cm in length. It has a black crown and eye stripes separated by a broad white supercilium. The underparts are pale grey and the upperparts pale brown. The folded wings are chestnut and the tail is black, tipped white. The bill is black.<p>Sexes are similar, but young birds have a brown cap and a pale yellow bill. There are 14 subspecies, varying in size and the colour of the back, underparts and eyestripe.<p>Black-crowned tchagra has a descending whistling song, chee-chee chee cheroo cheroo, and can be readily tempted into sight by imitating this call, presumably because the bird is concerned that there is an intruder in its territory. The male also has a switchback display flight.
分类信息
In 1760 the French zoologist Mathurin Jacques Brisson included a description of the black-crowned tchagra in his Ornithologie based on a specimen collected in Senegal. He used the French name La pie-griesche gris du Sénégal and the Latin Lanius Senegalensis cinereus. 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 black-crowned tchagra. Linnaeus included a brief description, coined the binomial name Lanius senegalus and cited Brisson's work. The species is now placed in the genus Tchagra that was introduced by the French naturalist René Lesson in 1831. Nine subspecies are recognised.
- 学名
- Tchagra senegalus
- 命名信息
- (Linnaeus, 1766)
- 目
- Passeriformes
- 科
- Malaconotidae
- 属
- Tchagra
分布与栖息地
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Pied Falconet
Microhierax melanoleucos
Ridiculously adorable panda-faced raptor, usually found in extended family groups ranging in size from 4 to 20. Perches on exposed snags, sallying forth to catch prey; capable of taking passerines only slightly smaller than it is. Black above and white below, with a white face and a thick black stripe extending down behind the eye. Flight is fluttery but fast; black barring on the wings and tail is only visible in flight, as is a thick black streak on the armpit, reminiscent of Black-bellied Plover.
Buff-bellied Warbler
Phyllolais pulchella
Plain and inconspicuous little warbler. The underparts are pale buff, and the legs and bill pink. Found in dry savanna habitats, mostly in acacia trees. Always in pairs or small groups which feed actively in the canopy. The call is a quiet repeated “tik” and the song a short dry trill. Even plainer than most other small, plain birds. Distinguished from Willow Warbler by the white outer tail and lack of a distinct eyebrow.
Checker-throated Stipplethroat
Epinecrophylla fulviventris
This antwren is tiny, round, and short-tailed. There are no bright colors, just a mix of buffy underparts and grayer-brown upperparts. Look for the male’s distinctive black-and-white spotting on throat. Female lacks this feature, but note her dark wing with buffy spots. Both sexes have a pale eye. Found in pairs or small flocks, usually in the lower levels of forests. Often joins larger mixed-species flocks.
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。