Turquoise-fronted Amazon
Amazona aestiva
Large, frequently encountered parrot of woodlands, savannas, and open areas. The body is bright green with a blue forehead and a yellow crown. The amount of yellow on the head varies between individuals and regions; some having mostly yellow faces. The amount of red or yellow on the shoulders also varies. In flight shows large red patches on the inner wings.
识别特征
The blue-fronted amazon is a mainly green parrot about 38 cm (15 in) long. They have blue feathers on the forehead above the beak and yellow on the face and crown. Distribution of blue and yellow varies greatly among individuals. Unlike most other Amazona parrots, its beak is mostly black. There is no overt sexual dimorphism to the human eye, but analysis of the feathers using spectrometry, a method which allows the plumage to be seen as it would be by a parrot's tetrachromatic vision, shows clear differences between the plumage of the sexes. Juveniles of parrots are duller and have dark irises.
分类信息
The blue-fronted amazon was one of the many species originally described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae. Its specific epithet is the feminine form of the Latin adjective aestivus, "of the summer". Two subspecies are recognized:<p>The taxon xanthopteryx has been treated as a separate species, but the two subspecies interbreed freely where they come into contact.<p>Additionally, there are significant individual variations in both facial pattern and amount of yellow/red to the "shoulder". In one extreme, individuals with essentially no yellow on the head and entirely green "shoulders" are known from north-western Argentina.
- 学名
- Amazona aestiva
- 命名信息
- (Linnaeus, 1758)
- 目
- Psittaciformes
- 科
- Psittacidae
- 属
- Amazona
分布与栖息地
The range of the blue-fronted amazon extends over eastern and northern Bolivia, eastern Brazil, Paraguay and northern Argentina. It is found in forests (though generally avoids extensive humid forests such as the Amazon), woodland, savanna and palm groves.<p>A small feral breeding population is also present in the greener regions of Stuttgart in Germany. Although they have been observed in the wild in Puerto Rico, they are probably the result of escaped pets, and no reproduction has been recorded.
- 迁徙
- Vertical migration
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
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Glaucidium cuculoides
A medium-sized, rotund owl often found during the day on exposed perches such as telephone wires. Brown overall with brown-barred underparts. Similar to Collared Owlet, but Asian Barred lacks false eye spots on the back of the head, has darker brown barring on the sides, and is larger. Calls (a long series of mellow toots) mostly at night, but can often be located during the day by the presence of mobbing songbirds. Found in a wide range of wooded habitats, including large parks and gardens.
Black-headed Nightingale-Thrush
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Small, plain-breasted thrush of tropical and subtropical evergreen forest in foothills and highlands. Usually elusive and heard far more often than seen. Feeds mainly on the ground, but also in fruiting bushes and trees. Sings from low to middle level perches. Plumage distinctive, with blackish cap, contrasting orange eyering and bill, and dusky upperparts. In dark shady understory, could be confused with Orange-billed Nightingale-Thrush, which has rusty brown upperparts. Song distinctive: slightly scratchy and not very fluty.
Chestnut-collared Swallow
Petrochelidon rufocollaris
Handsome swallow restricted to relatively dry regions of western Ecuador and western Peru. Plumage is blue and white with chestnut collar, breast band, sides, rump, and forehead. Similar to Cliff Swallow, which is a rare migrant within the range of Chestnut-collared, but note the chestnut breast band and lack of white on the forehead. Most often encountered around cities and towns, where it nests colonially in the eaves of buildings.
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