Yellow-billed Teal
Anas flavirostris
Widespread and often common small duck of wetlands, lakes, river mouths, Andean bogs, and streams. Rather small and compact with a dark head, a bright yellow bill (duller for a short while on young birds), and plain grayish sides. The similar Yellow-billed Pintail is larger and more elegant with a paler head and mottled sides. Teal populations in the high Andes (“Altiplano Teal”) have noticeably paler gray sides than southern lowlands birds (“Austral Teal”).
识别特征
The namesake bill is bright yellow with a black tip and a black band along the ridge of the culmen.The species is somewhat similar to the larger yellow-billed pintail, but has a darker head, shorter neck and plain grayish sides.
分类信息
Mitochondrial DNA sequence data is most similar to that of the very different-looking green-winged teal. Apart from the mystifying relationship with the red-and-green-headed teals, it altogether most resembles the Indian Ocean radiation of teals. However, the yellow-billed teal's unicolored underside and namesake bill are unique, as is to be expected from a species that evolved half a world apart from Bernier's or the grey teal.<p>This species is also unique among its relatives in some aspects of its post-copulation behavior: After dismounting, the drakes stretch themselves up high and swim around and alongside the females.<p>Traditionally, there are 2 subspecies:<p>Previously, this species and the Andean teal formed the superspecies speckled teal, but increasingly taxonomists consider the two species distinct.
- 学名
- Anas flavirostris
- 命名信息
- Vieillot, 1816
- 目
- Anseriformes
- 科
- Anatidae
- 属
- Anas
分布与栖息地
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Black-and-white Hawk-Eagle
Spizaetus melanoleucus
Rare but spectacular eagle of lowland tropical forest. Very rarely seen perched, when black mask, orange-yellow base of bill, and short black crest are distinctive. In flight appears bright white below with a white head and blackish upperparts. The diagnostic, white leading edge of the inner half of the wing contrasts with the black upperside and can be seen in flight at long range. Does not call much when flying, unlike Black and Ornate hawk-eagles. Adult similar to pale immature Gray-headed Kite, but is larger and has orange base to bill.
Gilded Flicker
Colaptes chrysoides
Large woodpecker, very similar to Northern Flicker. Overall pale sandy brown with gray face and brown crown. Spotted below with black oval on chest. Underwing and shafts of flight feathers bright yellow. Males have red mustache stripe; sexes otherwise alike. Combination of face pattern and yellow in wings helps distinguish from both "Red-shafted" and "Yellow-shafted" Northern Flickers. Shows a strong affinity for saguaro cactus but also found in nearby woodland. Gives a piercing "kleer" call similar to Northern Flicker.
American White Pelican
Pelecanus erythrorhynchos
Extremely large and conspicuous. White with black wingtips. Very long, orange bill with pouch for scooping up fish. Forages in flocks, swimming together to concentrate fish. Often soars in flocks, infrequently flapping, during migration and when traveling between feeding sites.
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