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
行为
Migration pattern: Vertical migration.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Pinto's Spinetail
Synallaxis infuscata
Spinetail with a largely dark body contrasting with a rich rusty crown, wings, and tail. Note the streaked whitish throat. In its tiny range, found in the understory at the edge of remnant humid forest fragments and in adjacent second-growth vegetation. The call is a repetition of “teh-teh-teh” notes.
Great Thrush
Turdus fuscater
True to its name, Great Thrush is noticeably large, almost recalling a jay rather than a thrush. Brown overall, varying across range from dark blackish to paler grayish-brown. Note orange bill and legs and yellow eyering (males only). Common and conspicuous in highlands from 2,000–4,000 m. Found in open habitats including forest edges, gardens, towns, and cities, where it is often bold and easy to see. Compare with Chiguanco Thrush, which overlaps in some areas. Great Thrush is larger, darker, and males have yellow eyering.
Philippine Oriole
Oriolus steerii
A medium-sized bird of lowland and foothill forest and edge. Olive-yellow above with a gray chest, a heavily streaked belly, bright yellow under the base of the tail, a red bill, and orange eyes. Races differ, with Sulu birds being brighter yellow above and having light streaking on the pale gray chest. The only other oriole in range is Black-naped Oriole, which has bright yellow underparts. Song consists of typical oriole-like, medium-pitched notes, some given singly and others in short, melodic phrases.
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