Golden-tailed Sapphire
Chrysuronia oenone
Small hummingbird of humid lowlands. Males are iridescent green with bluish face and rich reddish golden rump and tail; females are similar but lack the blue face and are paler gray below. Usually found around forest edges and oxbow lakes; often one of the most common hummingbirds at feeders in their range.
识别特征
The golden-tailed sapphire is 9.5 to 10 cm (3.7 to 3.9 in) long. Males weigh 4.7 to 6.3 g (0.17 to 0.22 oz) and females 4.3 to 5.3 g (0.15 to 0.19 oz). Both sexes of all subspecies have a slightly curved bill with a black maxilla and a black-tipped red mandible. <p>Adult males of the nominate subspecies have a violet-blue head and throat. Their back is bright green that transitions through bronze-green to bright coppery coverts and a copper-bronze tail. Their breast is glittering green, their belly bronze-green, and underneath their tail, their coverts are bronze with whitish edges.<p>Adult females have a blue crown, a green back, and copper-bronze coverts and tail. Their undersides are mostly whitish, with blue-green flecks on the sides of the throat and neck, green on the sides and chest, bronze-green flanks, and underneath their tail, they have bronze coverts. Juvenile males have a dull green crown, a dusky gray throat, and a dull green chest; early adult feathers on the head and throat are a purer, less violet, blue than the adult's. Juvenile females' throat speckles are duller and more bronze-coloured than the adults'.<p>Subspecies C. o. josephinae and C. o. alleni when treated separately have some differences from the nominate and from each other. Males of the former have a mostly green throat and a green rump that contrasts with the coppery coverts. C. o. alleni has an entirely green throat and little blue on the cheeks and its rump is coppery.
分类信息
The golden-tailed sapphire was formerly placed in the genus Amazilia. A molecular phylogenetic study published in 2014 found that Amazilia was polyphyletic. In the revised classification to create monophyletic genera, the golden-tailed sapphire was moved by most taxonomic systems to Chrysuronia. However, BirdLife International's Handbook of the Birds of the World (HBW) retains it in Amazilia.<p>The International Ornithological Committee (IOC) recognizes two subspecies of golden-tailed sapphire, the nominate C. o. oenone and C. o. josephinae. The Clements taxonomy and HBW add a third, C. o. alleni, that the IOC includes within josephinae.
- 学名
- Chrysuronia oenone
- 命名信息
- (Lesson, RP, 1832)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Chrysuronia
分布与栖息地
The nominate subspecies of golden-tailed sapphire is the most widely distributed. It is found in the Serranía del Perijá that straddles the Colombia/Venezuela border, further east in western and northern Venezuela, and south through east central Colombia, eastern Ecuador, and extreme western Brazil into extreme northeastern Peru. C. o. josephinae sensu stricto is found in most of the rest of eastern Peru. C. o. alleni is found in northern Bolivia.<p>The golden-tailed sapphire inhabits semi-open landscapes like the edges and gaps in humid forest, mature secondary forest, gallery forest, shady cacao and coffee plantations, and gardens. In Colombia and Venezuela it ranges in elevation from sea level to 1,500 m (4,900 ft) and in Ecuador between 400 and 1,200 m (1,300 and 3,900 ft).
- 迁徙
- Resident species
行为
The golden-tailed sapphire apparently moves locally according to the availability of flowering plants but details are lacking.<p>The golden-tailed sapphire forages for nectar at a variety of flowering shrubs (e.g. Aphelandra) and trees (e.g. Erythrina and Inga). Males tend to forage in the canopy, sometimes gathering in "quarrelsome assemblages", while females forage more by trap-lining in the forest, visiting a circuit of flowering plants. In addition to nectar, it feeds on arthropods by hawking from a perch or by gleaning from foliage.<p>The golden-tailed sapphire's breeding season varies geographically. It spans at least June to November in eastern Colombia but is January through April in western Brazil. Males usually gather in groups of five to 10 at leks to display to females but sometimes display alone. The nest is cup-shaped and has green moss on the outside for camouflage. The female incubates the clutch of two eggs for about 14 days and fledging occurs about 28 days after hatch.<p>The golden-tailed sapphire's song is variable, described as "a repeated rhythmic phrase, often starting with a burry note, followed by several very squeaky or scratchy notes, and ending with repeated chips." It also makes calls described as "a drawn-out metallic trill and shorter chipping notes."
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Snowy Cotinga
Carpodectes nitidus
Male is entirely snowy white with stout dark bill. Female also has stout gray bill, but body entirely pale gray with obvious white edges on wing feathers. Rather chunky body with short tail and smoothly rounded head, large black eye. Distinctive in limited range. Found in forest canopy, often seen around fruiting trees. Frequently perches conspicuously, but can descend into foliage when feeding. Quiet.
LeConte's Sparrow
Ammospiza leconteii
This strikingly beautiful sparrow is found in wet meadows with tall grass. Look for the bright orange-buff face with a silvery cheek, spotted purplish-gray nape, and crisp black streaking on buffy underparts. Secretive; difficult to see well unless a male is perched up singing. Most similar to Nelson's Sparrow but typically found in slightly drier habitats; also note white stripe down center of crown on LeConte's. Sings a dry, hissing trill with sharp introductory notes.
Common Pauraque
Nyctidromus albicollis
Cryptically patterned nightbird; widespread and common in Central and South America, limited U.S. range. Found in shrubby woodlands. Patterned with gray, gold, and brown; note especially cinnamon cheeks and golden edges on back and wing feathers. In flight, note white outer tail feathers and white bar across the wings. Roosts on the ground during the day; actively hunts for insects at night. Song is a distinctive, rich, slightly buzzy "pur-WEEooo." Relatively long tail compared with other similar nightbirds.
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