Cocos Tyrannulet
Nesotriccus ridgwayi
Small and drab flycatcher found only on Cocos Island, which is located in the Pacific Ocean about 300 miles southwest of mainland Costa Rica. Most birds are brown above with a buffy belly, with tan wingbars and a pale eyebrow. Some individuals have a brighter yellow belly or an olive-tinged back. Inhabits humid forest as well as scrubby and swampy areas, often in dense vegetation. Typical song is a short, descending sputter.
识别特征
Small and drab flycatcher found only on Cocos Island, which is located in the Pacific Ocean about 300 miles southwest of mainland Costa Rica. Most birds are brown above with a buffy belly, with tan wingbars and a pale eyebrow. Some individuals have a brighter yellow belly or an olive-tinged back. Inhabits humid forest as well as scrubby and swampy areas, often in dense vegetation. Typical song is a short, descending sputter.
分类信息
- 学名
- Nesotriccus ridgwayi
- 命名信息
- Townsend, CH, 1895
- 目
- Passeriformes
- 科
- Tyrannidae
- 属
- Nesotriccus
分布与栖息地
It is endemic to Cocos Island off Costa Rica. Its natural habitats are subtropical or tropical moist lowland forest, subtropical or tropical swamps, subtropical or tropical moist montane forest, and subtropical or tropical moist shrubland.
- 迁徙
- Resident species
保护状况
It is thought to be threatened by introduced species, particularly rats and feral cats, which prey on the species, and pigs which destroy habitat through foraging. There is no evidence yet of a decline, but is listed as Vulnerable due to its tiny range.
- 种群趋势
- stable
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分布
鸟叫声
其他鸟类

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This large trogon is the only one in its range with a pale eye. Male is green and red with no white band separating the chest from the belly; female similar but gray-brown instead of green. Otherwise, a typical trogon with upright posture, squared-off tail, and stout yellow bill. Sits still at middle levels in trees, slowly turning head searching for prey.

Ashy-bellied White-eye
Zosterops citrinella
Small songbird with bright yellowish upperparts and white “goggles.” Most subspecies have gray underparts; subspecies “unicus” of Sumbawa and Flores has a yellow belly. Compare with other white-eyes in various parts of their range; note present species combination of dark iris and yellow back. Inhabits a wide range of different wooded habitats across its range, including coastal scrub, mangroves, inland forests, and forest edge. Forages actively in small to medium-sized flocks, sometimes mixing with other species. Can be quite common on small islands. Twittering song is bright but unremarkable. Most frequently given call is a somewhat variable high-pitched, descending “djee.”

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