Blackish Nightjar
Nyctipolus nigrescens
A fairly small, dark nightjar found in the lowlands and foothills of northern South America. Intricately patterned with dark browns and grays; lacks any obvious features like a collar (although it sometimes shows a small white patch on the side of the neck). Males have small white corners on the tail. Almost always found at a landslide or rocky slope at the forest edge or in clearings, singly or in pairs. Most often detected at dawn and dusk, when it gives a burry “peer!” song and “pip” calls.
识别特征
The blackish nightjar is 19.5 to 21.5 cm (7.7 to 8.5 in) long and weighs 32 to 39 g (1.1 to 1.4 oz). Its upperparts are blackish brown with tawny, grayish white, and cinnamon spots. Its tail is dark brown with indistinct lighter bars and mottling and (on the male) a white tip. The underparts to the belly are dark brown with paler baring; the belly and flanks are buffy with darker barring. The throat has a small white patch on either side. In flight the wing shows a small white band.
分类信息
The blackish nightjar was originally placed in genus Caprimulgus, but DNA analyses show that it and its sister species pygmy nightjar (Nyctipolus hirundinaceus) require their own genus. The blackish nightjar is monotypic.
- 学名
- Nyctipolus nigrescens
- 命名信息
- (Cabanis, 1849)
- 目
- Caprimulgiformes
- 科
- Caprimulgidae
- 属
- Nyctipolus
分布与栖息地
The blackish nightjar is found east of the Andes in Peru, Ecuador, and southern Colombia, and across southern Colombia through southern Venezuela and the Guianas into northeastern and north-central Brazil. They inhabit lowland evergreen forest, but are mostly found on or near open rock outcroppings or on sand and gravel bars along small rivers. In elevation it ranges from sea level in Brazil to 900 m (3,000 ft) in Bolivia, 800 m (2,600 ft) in Colombia, 1,200 m (3,900 ft) in Ecuador, and 1,100 m (3,600 ft) in Venezuela.
- 迁徙
- Resident species
行为
The blackish nightjar is crepuscular and nocturnal. It forages on the wing from dusk to dawn over rock outcrops and above the forest canopy. It has also been recorded on foot picking prey from large rocks. Its diet has not been detailed but is known to include moths and beetles. During the day it roosts on rocks or fallen trees.<p>The blackish nightjar's breeding season varies across its range but almost everywhere is during the long dry season of August to November. Males display to females by erecting the tail to show the white markings. Females lay a single egg, usually in a depression in bare rock though occasionally on bare sand or soil. They nest singly or sometimes in small loose colonies.<p>The blackish nightjar's song is short, "a soft, purring pu'r'r'r'r't or qu'r'r'r'rt". During the mating display both the male and female sing. They also make a cluck or ptink alarm call and a "guttural hissing" threat display.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Philippine Green-Pigeon
Treron axillaris
A medium-sized pigeon of lowland and foothill forest canopy, with green underparts, head, and rump, a gray crown, yellow wingbars and edges to the flight feathers, a whitish belly, and white under the base of the tail. Note the whitish bill with a reddish base and the blue eyes. Male has a maroon shoulder and back, where the female is green. Similar to Thick-billed Green-Pigeon, but Philippine has a thinner bill and lacks the green skin around the eye. Female resembles female Pink-necked Green-Pigeon, but that species has yellow marks only on the edge of the wing. Voice is typical of green-pigeons, including a rising-and-falling out-of-tune whistled song.
White-tailed Shrike
Lanioturdus torquatus
Odd and distinctive terrestrial batis. Has long legs, an upright posture, and a white tail with a black dot near the tip. Found in dry woodland and savanna, often in rocky areas. Spends most of its time on or near the ground, though it will perch up in bushes. Usually in pairs. Vocalizations include piercing whistles, low croaks, and ratcheting calls. Similar to batises, but terrestrial habits and white tail easily identify it.
Long-tailed Honey-buzzard
Henicopernis longicauda
A large, long-tailed raptor of lowland and montane forest and clearings. Commonly seen in flight soaring in circles over the canopy with wing and tail feathers spread, showing strong barring. The only similar looking raptor that regularly soars is Pacific Baza, but Long-tailed Honey-buzzard has a streaked chest and lacks the buffy underwing and belly. When perched, similar to Doria’s Goshawk, but has yellow eyes and white legs. Usually silent.
开始您的观鸟之旅
在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。