Bates's Nightjar
Caprimulgus batesi
Large, dark, long-tailed forest nightjar. Males have small white patches in the outer wings and at the corners of the tail; females have all-dark wings and can show small buff tail corners. Found in lowland rainforest, including forest edge and clearings. The distinctive vocalization is usually given from a tree: a single barking “kow,” followed after a pause by a quick series of several similar notes. Found in the same habitat as Brown Nightjar, but larger and longer-tailed; males further distinguished by the pale patches in the wing and tail.
识别特征
Bates's nightjar is a large, dark nightjar. At rest looks large headed and long tailed. The upperparts and wing coverts are dark brown marked with black and buff streaks and spots, with a normally indistinct buff collar on the hindneck which may be more obvious on some individuals. The underparts are blackish brown with buff speckling on the breast, becoming barred on the belly, the throat is whitish. In flight the male shows a small white spot towards the wingtip and white tips to the two outer tail feathers. The female is paler and lack white spots on the wings or outer tail. They measure 29–31 cm in length and weigh 89–112g.<p>The song of Bates's nightjar is a loud "whow whowwhowwhowwhow" in which following the first note there is a pause then a repeated series of notes.
分类信息
- 学名
- Caprimulgus batesi
- 命名信息
- Sharpe, 1906
- 目
- Caprimulgiformes
- 科
- Caprimulgidae
- 属
- Caprimulgus
分布与栖息地
Bates's nightjar has a fragmented distribution, one population is found in southern Cameroon, another in western Cameroon, Gabon, southern Central African Republic and western Congo, a third slightly separate in the western Congo, with another in eastern Congo and north-western Democratic Republic of the Congo, a fifth population ranges across the Democratic Republic of the Congo and into eastern Uganda in the Bwamba Forest while the last population is in the central Democratic Republic of the Congo. Bates's nightjar occurs mainly in lowland primary rainforest where it prefers clearings and forest edges and can be common near water, especially near rivers or flooded forest. It can also be found in secondary forest and plantations close to the edge of primary rainforest.
- 迁徙
- Resident species
行为
Like most nightjars, Bates's nightjar is crepuscular and nocturnal. It roosts on the ground, in clearings or on paths, or several metres up perched on a liana. Forages for prey such as mantises, crickets, grasshopper, beetles and moths over and within the forest canopy, over clearings and along the edges of riverine forest. It does not build a nest and the single egg is laid directly onto the bare ground or among the leaf litter, nest site are sometimes on paths or trails. The breeding season is December to January in Gabon and potentially all tear in Democratic Republic of Congo.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Sooty Grassquit
Asemospiza fuliginosa
Small nondescript finchlike bird found at humid forest edges and in shrubby and grassy areas. Males are sooty black with a gray bill. Females are dark brown above and pale brown below with a brownish bill. The song is a buzzy “ezz’u’da’liu.”
Short-tailed Pygmy-Tyrant
Myiornis ecaudatus
Tiny stump-tailed flycatcher; one of the smallest birds on earth. Minute size and compact body give it a unique appearance, in some ways looking more like a bumblebee than a bird. Whitish underparts with green back, gray head, and white spectacles. Found in mature and secondary rainforest, especially in areas with tall trees. Usually perches in the rainforest midstory and can be tricky to spot. Its song is a soft pair of short trilled notes “trrr-trrr,” sounding rather insectlike.
Biak Megapode
Megapodius geelvinkianus
A small, dark scrubfowl of forest and disturbed habitats on the Bay Islands where the only member of its family. Sooty gray plumage, bare red to gray face, slight crest at the back of the head, reddish legs, and yellowish bill. It scrapes the forest floor with its large feet to uncover invertebrates. More often heard than seen. Vocal, giving varied parrotlike squeals. A common call is 2 tuneless yelps similar to New Guinea Scrubfowl, the first note higher than the second.
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