Creamy-bellied Gnatcatcher
Polioptila lactea
Distinctive gnatcatcher. Males have a glossy black cap and are gray above with a white face and yellow-washed underparts. Females have a gray cap. Forages acrobatically in the canopy and at the edges of humid forests and woodlands. May be seen alone or with mixed-species flocks. The song is a fast, thin “weet-weet-weet-weet.”
识别特征
The creamy-bellied gnatcatcher is 10 to 12 cm (3.9 to 4.7 in) long and weighs approximately 7 g (0.25 oz). The male has a bluish-black cap and white lores and supercilium. Its upperparts are dark slate blue. Its long tail's central feathers are black and the outermost white with those between being black and white. Its cheeks and underparts are pale yellowish transitioning to white on the lower belly. The female and juvenile are similar to the male but with slate gray crowns.
分类信息
The creamy-bellied gnatcatcher is monotypic. It has occasionally been thought to be conspecific with the tropical gnatcatcher (P. plumbea).
- 学名
- Polioptila lactea
- 命名信息
- Sharpe, 1885
- 目
- Passeriformes
- 科
- Polioptilidae
- 属
- Polioptila
分布与栖息地
The creamy-bellied gnatcatcher is found in southern Brazil from Mato Grosso do Sul and Rio de Janeiro states south to Santa Catarina state and adjoining southeastern Paraguay and northeastern Argentina. It inhabits several biomes including open humid forest and its edges, temperate rainforest, semi-deciduous forest, and scrublands. It elevation it usually occurs below 400 m (1,300 ft).
- 迁徙
- Resident species
行为
The creamy-bellied gnatcatcher's diet is not well known but is probably small insects and spiders. It forages by gleaning and hover-gleaning foliage, alone and in mixed-species foraging flocks.<p>Almost nothing is known about the creamy-bellied gnatcatcher's breeding phenology. One nest has been described. It was built by both sexes of moss and leaves in the crotch of a branch near the top of a 30 m (98 ft) high tree.<p>The creamy-bellied gnatcatcher's song is "a simple, rather fast repetition...tee tee tee tee swee swee swee" [1]. Its call is spie [2].
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Blue Cuckooshrike
Cyanograucalus azureus
A beautiful, entirely blue thrush-like bird that can be surprisingly hard to make out in the dark subcanopy of tropical forests as it forages high above the ground. When seen well, it is unmistakable, with its entirely blue body, red eyes, dark face, and black bill. When it is backlit in the trees, look for its distinctive profile perched close to branches with relatively short legs and tail, and its generally unicolored appearance. Occurs in small flocks whose calls consist of hoarse, whiny “tchuwee” and terse “tchup” notes. Song is a piercing “puuuEEEEoooo” or “wheeEEEr” that can be fairly variable in pitch and length.
White-bibbed Antbird
Myrmoderus loricatus
Medium sized, long-tailed antbird, which forages on the ground in humid forests. Strikingly patterned, but can be difficult to see. Note the rufous-brown crown, back, tail and vent, and pinkish legs. Males have black wing coverts with pale spots, a black face with a pale eyebrow, a black scalloped breast, and a white throat and belly. Females differ in having a buff throat and flanks.
Society Kingfisher
Todiramphus veneratus
A medium-sized kingfisher. Male of the Tahiti form is dark green above and white below with a paler aquamarine eyebrow. Male of the Moorea form is light tawny-brown above and whitish below with a pale collar. Female has a dark brownish chest band and is overall browner than male. Found in forested habitats up to 300 meters of elevation on Moorea and 1700 meters of elevation on Tahiti. Overlaps with Chattering Kingfisher, but lacks the white eyebrow of that species and is overall less pale and darker green. Typical rattling “ki-ki-ki-ki-ki” is commonly heard.
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