Rufescent Tiger-Heron
Tigrisoma lineatum
This medium-sized heron is found around swamps, marshes, and sluggish streams at lower elevations. Usually seen singly. Adults are distinctive with their bright rufous head and neck. Juveniles are buffy with uneven black barring. Juveniles essentially identical to juvenile Fasciated Tiger-Heron, but note different habitat.
识别特征
The rufescent tiger heron is a medium-sized heron, measuring 26–30 in (66–76 cm) in length, with a mass between 630 and 980 g (22 and 35 oz). The sexes are similarly plumaged. The adult's head, neck and chest are dark rufous, with a white stripe down the center of the foreneck. The remainder of its upperparts are brownish with fine black vermiculations, its belly and vent are buffy-brown, and its flanks are barred black and white. Its tail is black, narrowly barred with white. Its stout bill is yellowish to dusky, and its legs are dull green. Its irides, loral skin, and orbital ring are bright yellow. Unlike other tiger herons, it has no powder down feathers on its back.<p>The juvenile bird is rusty-buff overall, coarsely barred with black; the buff and black banding on its wings is especially pronounced. Its throat, central chest, and belly are white. It takes some five years to acquire adult plumage.<p>The adult rufescent tiger heron is relatively easy to distinguish from fasciated and bare-throated tiger herons, as it is rufous (rather than primarily gray) on the head and neck. Young birds, however, are much more difficult to identify.
分类信息
The rufescent tiger heron was described by the French polymath Georges-Louis Leclerc, Comte de Buffon in 1780 in his Histoire Naturelle des Oiseaux from a specimen collected in Cayenne, French Guiana. The bird was also illustrated in a hand-coloured plate engraved by François-Nicolas Martinet in the Planches Enluminées D'Histoire Naturelle which was produced under the supervision of Edme-Louis Daubenton to accompany Buffon's text. Neither the plate caption nor Buffon's description included a scientific name but in 1783 the Dutch naturalist Pieter Boddaert coined the binomial name Ardea lineata in his catalogue of the Planches Enluminées. The rufescent tiger heron is now placed in the genus Tigrisoma that was erected by the English naturalist William Swainson in 1827. The genus name Tigrisoma combines the Ancient Greek tigris, meaning "tiger" and somā, meaning "body"; the specific epithet lineatum is from the Latin lineatus meaning "marked with lines".<p>Two subspecies are recognised:
- 学名
- Tigrisoma lineatum
- 命名信息
- (Boddaert, 1783)
- 目
- Pelecaniformes
- 科
- Ardeidae
- 属
- Tigrisoma
分布与栖息地
The rufescent tiger heron is found in wetlands from Central America through much of South America. It generally occurs below 500 m (1,600 ft), though it has been recorded as high as 1,600 m (5,200 ft) in Colombia.
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Jameson's Snipe
Gallinago jamesoni
Chunky snipe of very high elevations in the Andes. Plumage has a complicated pattern of brown, buff, and black; note extensive barring on underparts and thick, drooping bill. Might be confused with Noble Snipe, but does not have a white belly. Compared to Imperial Snipe, it is smaller and lacks the warm, cinnamon coloration. Jameson’s Snipe inhabits paramo grasslands and stunted forest near tree line. Shy and rarely encountered unless flushed, when it gives a burst of sharp, abrupt “kek” notes.
Grenada Flycatcher
Myiarchus nugator
A medium-sized “fly-catching” species of open woodlands and scrub including towns, preferring areas near palms; often sits still on perch for long periods of time before leaping forth in pursuit of insects. Grenada Flycatcher has a dull brown back and a yellow belly that contrasts with its gray chest and throat. The Caribbean Elaenia is passingly similar but is smaller with a proportionately small bill, and it has bold wingbars and dull, low-contrast underparts. Vocalizations include an emphatic low “whip” given in a slow series and sometimes followed by a rolling “pit-it-oooo.” Also, this species gives a shrill “whee,” singly or in series.
Rufous-tailed Robin
Larvivora sibilans
Combination of strongly scaled breast, rufous tail, and round-headed appearance distinguish this species from others in its range. Small and skulky, sticking to dense shrubbery and shorter trees in its forest breeding grounds, where it favors dense, moist growth in lowland broadleaf forests. Often bolder on migration, emerging into forest edges and gardens. Song is distinctive, a long, wet-sounding descending trill.
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