Silvery-throated Jay
Cyanolyca argentigula
A small, striking jay with a very limited range in the highlands of Costa Rica and Panama. Unmistakable: mostly dark midnight-blue, brighter on the wings, with pale silvery throat and thin eyebrow. Sexes similar. Uncommon to rare in oak forests from around 2,000–3,200 m. Found in pairs or small flocks. Listen for harsh calls, typical of a jay.
识别特征
The silvery-throated jay is a distinctive small jay, unlikely to be confused with any other bird found within its range. The sexes are similar, with the adult being about 26 cm (10 in) in length including the long tail. The head is black with a narrow but obvious white supercilium, and it bears an inconspicuous crest of short stiff feathers on the forehead. The throat and breast are silvery-white, sometimes with a violet sheen. The mantle, neck and sides of breast are black which gradually blends into the dark purplish-blue of the rest of the plumage. The upper surfaces of the wings and tail are a brighter, paler shade of blue and the undersides are blackish. The irises are deep red and the bill and legs are black. The plumage of the juvenile is duller and lacks the white on the head.
分类信息
- 学名
- Cyanolyca argentigula
- 命名信息
- (Lawrence, 1875)
- 目
- Passeriformes
- 科
- Corvidae
- 属
- Cyanolyca
分布与栖息地
- 迁徙
- Resident species
行为
A sociable bird, it moves through the upper parts of the forest canopy in groups of four to ten. Outside the breeding season, larger groups of up to thirty may form, and they tend to roost communally, settling down for the night with much chatter. When foraging, they move methodically through the crowns of trees, searching in crevices and probing into mosses, lichens and other epiphytes. They feed on insects and other invertebrates, amphibians, lizards, fruit and berries. The breeding season is in the period March to June, but little is known about the nest and eggs of this bird.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Australian Pelican
Pelecanus conspicillatus
Very large and distinctive black-and-white pelican. Enormous bill with characteristic throat pouch. Usually found near water, both marine and inland waterways. Becomes tame around boat-ramps and fishing spots. Perches on lamp-posts.
Velvet-browed Brilliant
Heliodoxa xanthogonys
Large, dark hummingbird. Common in tepui highlands. Male is mostly shining green, especially on the throat, breast, and forehead; female is white below with extensive green spotting. Both sexes have conspicuous white spot behind eye. Occurs in a wide variety of habitats including tall forest, edge, and open scrub at middle and high elevations (above 800 m) in tepui region. Feeds on nectar and defends patches of flowers from other hummingbirds. Gives loud, sharp chip note while foraging. No other large, green hummingbird occurs in its limited range.
Short-billed Canastero
Asthenes baeri
Medium-sized, rather nondescript bird, plain dull brown with a tail that is usually held cocked. Note the orange throat patch. Inhabits arid areas with scrub and woodlands, where it forages both in trees and on the ground. The song is a high nasal trill. The similar Sharp-billed Canastero has a longer bill and tail and an indistinct eyebrow.
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