Savanna Nightjar
Caprimulgus affinis
Well-camouflaged nightbird, usually encountered roosting on gravel riverbeds, open areas in grasslands, rooftops, or roadsides. Sometimes found in small loose flocks when roosting. Fairly well adapted to urban life in some parts of its range and often found in towns and city edges. Intricately patterned gray-brown with less white than other nightjars; only males have a fairly small white patch on the wing near the tip. Most often detected by its distinctive, high-pitched, burry “chree-ik” song, repeated over and over.
识别特征
Its length is about 25 cm (9.8 in), with a wingspan of 64 cm and a body weight of 54-110g. The upperparts are brownish-grey and vermiculated, with pale brown speckles. The underparts are brown, with bars. The savanna nightjar is nocturnal and is recognizable by its characteristic loud chirping calls, mainly given in flight during the evening. Their acoustic features change and can preadapt based upon their habitat.
分类信息
- 学名
- Caprimulgus affinis
- 命名信息
- Horsfield, 1821
- 目
- Caprimulgiformes
- 科
- Caprimulgidae
- 属
- Caprimulgus
分布与栖息地
Its habitat is open forest and areas with scrub. However, it has recently moved gradually into the metropolitan areas of Taiwan, probably due to the absence of natural predators in that setting. Habitat loss is likely also a significant factor. Impacts of this relocation have included disturbed sleep for residents—due to male savanna nightjars' loud vocalizations at night from January to July—and collisions with aircraft. It is predicted to continue this habitat shift and expand its range into all major western Taiwanese cities.
- 迁徙
- Resident species
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
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