Bushy-crested Jay
Cyanocorax melanocyaneus
Only blue-and-black jay in its limited range in interior of northern Central America. Found in brushy woodland, pine-oak forest and edge, and plantations, foraging at all levels. Usually in small groups, which can be noisy and conspicuous or very quiet and easily overlooked. Sometimes found with mixed-species feeding flocks that include Green Jays and orioles. Lower breast and belly are tinged blue but often appear black. Bushy crest usually held flattened and thus not noticeable.
识别特征
The adult bushy-crested jay has a length of 28 to 30 cm (11 to 12 in). The tail is long and the central feathers are graduated. The sexes look alike; the head, neck, breast and upper mantle are black while the remaining upper parts are dark blue with a sheen of green or violet. The underparts are plain greenish-blue, the undersides of the wings are grey and the underside of the tail is blackish. The head bears a stubble-like erectile crown of feathers, the beak is black and relatively small, the irises are yellow and the legs black.
分类信息
- 学名
- Cyanocorax melanocyaneus
- 命名信息
- (Hartlaub, 1844)
- 目
- Passeriformes
- 科
- Corvidae
- 属
- Cyanocorax
分布与栖息地
This jay is native to Central America where it is found in Guatemala, El Salvador, Honduras and Nicaragua at altitudes between about 600 and 2,450 m (2,000 and 8,000 ft). Its habitat is humid forests, especially those with pine and oak, forest verges, glades and areas of scrub. It adapts well to degradation of its habitat and has become common in coffee plantations and around agricultural land.
- 迁徙
- Resident species
行为
The species is social and lives in small groups. These forage in the lower storey of trees and in the undergrowth, often descending to the ground to search through the leaf litter. The diet consists of invertebrates, seeds, nuts and fruits. The nest is built in dense undergrowth out of twigs and lined with plant fibres. One female lays a clutch of three or four eggs in late April or early May. Another female shares the incubation of the eggs with her, and many birds assist with the feeding of the young. In one nest, eleven different adults helped feed the brood, as well as some juveniles that had hatched earlier.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Bougainville Hooded Whistler
Pachycephala richardsi
A distinctive whistler of dark, dingy appearance. Golden-olive above and bright yellow below, with a black hood and chest. Female golden below and olive above, with a gray head and a white throat. Mainly found in primary forest above 1200 meters of elevation, but does occasionally wander lower. Oriole Whistler also occurs but male has a bright golden throat, neck, and belly, and female is dark brown above and beige streaked with ruddy below. Bougainville Hooded Whistler’s voice is a mix of loud, almost electronic staccato whistles.
Red Goshawk
Erythrotriorchis radiatus
Heavily built rusty red raptor with large yellow legs and feet. When perched, the tail is longer than folded wings (Square-tailed Kite has wings extending below the tail). In flight note bulging trailing edge to wing. Tends to soar with wings back and head protruding. Extremely rare and typically limited to tropical areas near river systems in northern Australia. Please try to get a photo if you see one!
Emperor Bird-of-Paradise
Paradisaea guilielmi
A large bird of mid-mountain forests on the Huon Peninsula. Male has 2 long black tail streamers, chestnut wings and white plumes which he spreads in his elaborate display, hanging upside down and swaying from side to side. Female has a black face and chest. Overlaps with Raggiana and Lesser Bird-of-Paradise, but usually found at higher elevations, has a dark reddish eye, male has a bottle green chest and female more yellow on the back of the neck. Voice, a nasal “caw!” or excited whooping.
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在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。