Bay-headed Tanager
Tangara gyrola
Stunning tanager: mostly green with reddish head. Some populations have electric blue underparts, others entirely green. Similar to Rufous-winged Tanager but always has green wings. Found in pairs or small flocks in forest and edges, often in mixed feeding flocks from midstory to the canopy. Feeds on fruit.
识别特征
Adult bay-headed tanagers are 14 cm long and weigh 19.5 g. The nominate race T. g. gyrola is mainly green apart from a chestnut head, a blue or green belly, and a thin gold collar on the hind neck. Sexes are similar, but immatures are duller with chestnut-flecked green heads. There is considerable plumage variation between the various subspecies, and T. g.viridissima of northeast Venezuela and Trinidad has green underparts concolorous with the rest of the body plumage.<p>The bay-headed tanager's song is a slow seee, seee, seee, tsou, tsooy.
分类信息
The bay-headed tanager was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae under the binomial name Fringilla gyrola. The specific epithet is a diminutive of the Latin gyrus meaning "ring". Linnaeus based his own description on the "red-headed green-finch" that had been described and illustrated by the English naturalist George Edwards in 1743 in his A Natural History of Uncommon Birds. The type locality is Suriname. The bay-headed tanager is now placed in the genus Tangara that was introduced by the French zoologist Mathurin Jacques Brisson in 1760.<p>Nine subspecies are recognised:
- 学名
- Tangara gyrola
- 命名信息
- (Linnaeus, 1758)
- 目
- Passeriformes
- 科
- Thraupidae
- 属
- Tangara
分布与栖息地
It occurs in forests, particularly in wetter areas. The bulky cup nest is built in a tree and the normal clutch is two brown-blotched white eggs. The female incubates the eggs for 13–14 days to hatching, with another 15–16 days before the chicks fledge.
- 迁徙
- Resident species
行为
These are social birds which eat mainly fruit, usually swallowed whole. Insects are also taken, mainly from the underside of branches.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Olive-headed Weaver
Ploceus olivaceiceps
A localized woodland weaver that has a dusky-olive head and upperparts, and golden-yellow underparts. Brighter male has a golden-yellow crown and more extensive rusty breast patch. Juvenile is much paler. Restricted to mature Miombo woodland where ‘Old Man’s Beard’ Usnea lichen is abundant. Singles and pairs sometimes join mixed-species flocks and forage secretively for insects by creeping along branches like a nuthatch or creeper; does not nest colonially. Not very vocal, but occasionally calls a series of soft high-pitched buzzing notes ‘tzee-twa-twa’.
Pale-bellied Hermit
Phaethornis anthophilus
Large, long-tailed hermit found in northern Colombia and western Venezuela. Like many other hermits, the bill is long and decurved and the central tail feathers are elongated with white tips. Note the pale eyebrow that contrasts with its black mask. Also note whitish underparts and dull greenish upperparts without bright rufous tones. Fairly common in lower levels of dry forests, mangroves, and plantations. Most frequently seen visiting Heliconia flowers.
African Thrush
Turdus pelios
This widespread thrush shows a large amount of geographical variation. The upperparts are generally gray-brown, while the underparts can be buff, gray, or rufous. All across the range, shows a yellow bill. Found in a range of habitats, including forest edge, woodland, gardens, and cultivation. In areas without Abyssinian Thrush, also occurs in montane forest. The song is a pretty, variable series of chatty whistles and trills which can continue for a long time without a pause. Similar to Abyssinian Thrush, but found at lower elevations in areas of overlap, and is generally paler, with a paler yellow bill.
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