Northern Potoo
Nyctibius jamaicensis
Bizarre, big-headed, and bug-eyed nocturnal bird with yellow eyes and cryptically streaked plumage. Found in wooded and semiopen habitats in tropical lowlands, including mangroves. Roosts upright on branches, where it blends in and looks like a broken tree branch. At night in a flashlight beam, eyes reflect like brilliant amber coals (nightjar eyes are duller and owl eyes have a dull reflection and are rarely visible). Hunts from posts and prominent perches; sallies out for insects and often returns to the same perch.
识别特征
It is a fairly large bird with a length of 38-46 centimetres. It has a long tail, long pointed wings, large head, very short legs and a small bill with a large gape. It is most commonly seen perched motionless in an upright position on branches or posts. The plumage is grey-brown with an intricate pattern of black, grey and cream markings. The cheeks are pale with a dark malar stripe below them. The large eye has a yellow iris which can shine red in light at night. The bird's calls are hoarse and guttural. The common potoo is virtually identical in appearance, but has a very different voice consisting of a series of mournful, wailing whistles. The great potoo is larger and paler, with no dark malar stripe.<p>The song is a "rough, squalling kwaaah, kwa-kwa-kwa". It also makes "an abrupt, emphatic rrah!" and "a barking alarm call".
分类信息
The northern potoo was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's Systema Naturae. He placed it with all the nightjar like species in the genus Caprimulgus and coined the binomial name Caprimulgus jamaicensis. Gmelin based his description on earlier accounts of the bird in Jamaica, including Hans Sloane's "Wood owle" published in 1725 and John Latham's "Jamaican goatsucker" published in 1783. The northern potoo is now one of the seven potoos placed in the genus Nyctibius that was introduced in 1816 by the French ornithologist Louis Pierre Vieillot. The genus name is from Ancient Greek nuktibios meaning "night-feeding", from nux night and bios "life". The specific epithet is from the toponym, Jamaica, the type locality.<p>The northern potoo was formerly classified as a subspecies of the common potoo (Nyctibius griseus), but since 1995 it has usually been treated as a separate species based on the differences in vocalizations. <p>Five subspecies as recognised:
- 学名
- Nyctibius jamaicensis
- 命名信息
- (Gmelin, JF, 1789)
- 目
- Nyctibiiformes
- 科
- Nyctibiidae
- 属
- Nyctibius
分布与栖息地
The five subspecies are distributed across Central America and the Caribbean. It mainly occurs in lowland areas where it inhabits woodland and scrubland with clearings and farmland with scattered trees. It is sometimes seen around golf courses and urban areas. It is a occasional visitor to Puerto Rico and its permanent presence in Cuba is unconfirmed, but reported.
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Roraiman Antwren
Herpsilochmus roraimae
A common but inconspicuous bird of tepui forest canopy. Usually seen from below; note long shape accentuated by heavy bill and long tail. Male is gray above and white below, with a black crown, bold white eyebrow, wing spotting, and extensively white undertail. Females are similar to males but have more brown tones in plumage. Forages sluggishly in canopy of tepui foothill forest, searching for insects along branches and in leaf clusters. More common at lower elevations than many other tepui endemics (sometimes below 500 m). Usually in pairs and best detected by voice; often follows mixed-species flocks but also found away from them. Contact call is a rubbery smacking, often doubled and repeated in long series by members of a pair. Song is a hoarse, emphatic series of laughing notes, decelerating and dropping slightly in pitch. Similar to Spot-tailed and Todd’s antwrens (and may overlap with latter at lower elevations) but substantially larger, with bolder markings and more white in tail; song is similar to that of Todd’s but longer and hoarser.
Black-chested Fruiteater
Pipreola lubomirskii
Scarce fruiteater found in cloud forest along the east slope of the Andes in Ecuador, southern Colombia, and northern Peru. Male has a solid black hood that is not bordered by yellow on the neck. Female is mostly green with yellow streaking on her belly. Yellow eyes and dark legs are also useful features in both sexes to separate them from similar species. Feeds on berries at middle to upper levels in the forest. Gives very high-pitched whistles, some very short and others long and drawn out.
Red-crested Bustard
Lophotis ruficrista
A medium-sized, black-bellied bustard with diagnostic white chevrons on a brown-and-black mottled back. The male has a brown-gray neck and slaty cap, and the female is plainer. The name is misleading, as the red crest is almost always hidden. It walks slowly and steadily in arid woodlands, where it is common but due to its camouflage often avoids detection. The song is a sequence of clicking “tic-tic” notes that are followed by a mournful piping “sweee-swee-sweee sweet” series that accelerates to a crescendo. The male indulges in an absurd display in which he flies nearly vertically into the sky and then folds his wings and somersaults down as if shot, only to unbelievably land on his feet. In flight the Red-crested Bustard’s all-black underwings differentiate it from Black-bellied Bustard, which has white windows in the underwing.
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