White-tailed Goldenthroat
Polytmus guainumbi
Small hummingbird with a long, curved bill. Males are mostly green with a white lower belly and white undertail feathers. Note the contrasting black mask set off by a white line above and below. Females are paler below than males and have a green-spotted breast. Usually found in grasslands and marshes; often near water.
识别特征
The white-tailed goldenthroat is 9.7 to 11.8 cm (3.8 to 4.6 in) long and weighs 4.4 to 5 g (0.16 to 0.18 oz). All subspecies have a long decurved reddish and black bill. The male of the nominate subspecies has shiny golden to bronzy green upperparts. Its tail is long and rounded; the feathers are mostly green with white tips and the outer three pairs have broad white edges. The area around the eye is dusky gray with white streaks above and below it. The underparts are iridescent golden-green. The female has buffy streaks on the face, a whitish chin, and buff underparts with green spots on the throat and breast. P. g. andinus is like the nominate but with more white on the inner tail feathers. P. g. thaumantias has a somewhat shorter bill than the nominate, its upperparts are reddish gold, and it has less white on the outer tail feathers.
分类信息
The white-tailed goldenthroat was at one time named Polytmus thaumantias. It has three subspecies, the nominate P. g. guainumbi, P. g. andinus, and P. g. thaumantias.
- 学名
- Polytmus guainumbi
- 命名信息
- (Pallas, 1764)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Polytmus
分布与栖息地
The nominate subspecies of white-tailed goldenthroat is found in Trinidad and from Venezuela through the Guianas into coastal northern Brazil's Amapá state. P. g. andinus is found in eastern Colombia as far south as Meta and Vichada departments.P. g. thaumantias is found from extreme southeastern Peru across Bolivia and Brazil to the Atlantic Ocean and south into eastern Paraguay and northeastern Argentina. In eastern Brazil it occurs from Maranhão south as far as northern Paraná. The species inhabits a variety of landscapes including wet grassland, shrubby savanna, cerrado, and freshwater swamps, and in dryer areas tends to be near any water. In elevation it ranges from sea level to 600 m (2,000 ft).
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
- 种群趋势
- unknown
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分布
鸟叫声
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