Jamaican Crow
Corvus jamaicensis
An all black and somewhat large species that prefers wet forests but also occurs in open woodlands. Often found perched high on bare branches of trees or working epiphyte clumps and tree nooks in search of large insects and small lizards. All species in its range that are entirely black are considerably smaller than the Jamaican Crow. Calls include emphatic harsh “raaaa,” given singly or in series, a more leisurely “craaa-aa” and variations thereof, and somewhat of a musical burbling.
识别特征
The overall appearance is sooty-grey, not at all glossy, like its relatives; though it does possess a similar dark grey patch of naked skin just behind the eye, and a smaller naked patch at the base of the bill. The bill itself is slate-grey and quite deep, tapering to a sharp point. The nasal bristles are relatively sparse usually leaving the nostrils on view. The iris is either grey-brown or red-brown, possibly depending on age. The legs and feet are black.<p>The voice, like its two nearest relatives, is very distinctive and consists of various jabbering and bubbling sounds (thus its common Jamaican Patois name, jabbering crow), but also a more leisurely “craaa-aa” and variations thereof, and somewhat of a musical burbling.
分类信息
The Jamaican crow, under the name "chattering crow", was described by the English naturalists John Ray in 1713 and Hans Sloane in 1725. The Irish physician Patrick Browne used the name "gabbling crow" for the species in 1756. In France the naturalists Mathurin Jacques Brisson in 1760 and Comte de Buffon both used the name "La corneille de la Jamaique". A binomial name was not introduced until 1788 when the German naturalist Johann Friedrich Gmelin revised and expanded Carl Linnaeus's Systema Naturae and coined the binomial name Corvus jamaicensis. The species is monotypic: no subspecies are recognised.
- 学名
- Corvus jamaicensis
- 命名信息
- Gmelin, JF, 1788
- 目
- Passeriformes
- 科
- Corvidae
- 属
- Corvus
分布与栖息地
As its name suggests, this species is found on the island of Jamaica, where it inhabits woodland mixed with cleared areas, and can be frequently found in larger gardens. Though primarily a bird of hill and mountain forest, it comes down to lower elevations during the dry season, where it is more likely to be seen.
- 迁徙
- Vertical migration
行为
A forest crow by nature, its food requirements contain a significant proportion of fruit taken from trees, either in pairs or small groups. It also probes under bark and leaf litter for small invertebrates and lizards, and it is known to raid other birds nests of both eggs and nestlings.<p>The nest itself is usually built in tall trees; this species may also use tree holes as a possible nesting option, although not yet recorded for this species and its breeding habits.
保护状况
- 种群趋势
- rising
照片
分布
鸟叫声
其他鸟类
White-naped Swift
Streptoprocne semicollaris
Very large, spectacular swift of highlands in west Mexico, also descending locally to foothills and lowlands. Often in flocks, at times of hundreds, especially around waterfalls and other roosting sites. Flight fast and strong, often soaring in kettles with wings spread in paddlelike bulges. Note the very large size, thick white nape band (often visible in a side view), and slightly notched tail (tip squared when tail is spread). Varied screaming and chattering calls can suggest parakeets.
Elegant Crested-Tinamou
Eudromia elegans
Distinctive and striking tinamou, nearly endemic to Argentina, from northern Patagonia through the Monte desert region. Prefers open, rocky habitat. In the northern chaco replaced by similar Quebracho Crested-Tinamou. Often found by its three-part whistled song: a “twee-tyoo-too” similar to but less emphatic and more consistently pitched than Red-winged Tinamou.
Collared Trogon
Trogon collaris
Relatively small, red-bellied trogon of humid forest in tropical lowlands and foothills. Perches at all levels inside forest, less often at edges. Male’s tail is dark below with narrow white barring; female’s tail is pale grayish below with narrow black-and-white bars at the tips. In most areas, the only other red-bellied trogon in the same habitat is the larger and distinctive-looking Slaty-tailed Trogon.
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