Humboldt's Sapphire
Chrysuronia humboldtii
Fairly small hummingbird with limited range near the coast from extreme southeast Panama to northwest Ecuador. Males are distinctive: mostly green with a bluish crown and throat, white undertail coverts, and a white stripe up the belly. Note bright red bill with a black tip. Females have dingy whitish underparts with some green spotting on the neck and flanks; look for reddish bill base. Occurs in scrubby second growth and mangroves in coastal lowlands, most often seen around a flowering tree or shrub.
识别特征
Humboldt's sapphire is 9 to 12.5 cm (3.5 to 4.9 in) long. Males weigh 6.3 to 6.6 g (0.22 to 0.23 oz) and females 5.8 to 6.4 g (0.20 to 0.23 oz). Males have a straightish coral red bill with a black tip. Females' bills have a black maxilla with red at its base and a mostly pinkish mandible with a black tip. Adult males have a deep blue forehead and center of the throat. Their crown is dull dark blue-green and the rest of their upperparts metallic green to bronze-green. Their tail is dark metallic green to blue with dusky gray tips on the outer feathers. Their chest, sides of the neck, and cheeks are blue-green to green, their sides green, and the center of their belly and their undertail coverts white. Adult females have a blue crown and metallic green to bronze-green upperparts and tail; their outer tail feathers have dusky gray tips. Their underparts are mostly white with bright green flecks on the sides of the throat and breast. Juvenile males have much white below, with a bronze-flecked breast, and their crown and face are dull dark bluish green.
分类信息
Humboldt's sapphire was formerly placed in the genera Hylocharis and Amazilia. It was moved by most taxonomic systems to Chrysuronia based on the results of a molecular phylogenetic study published in 2014. However, BirdLife International's Handbook of the Birds of the World (HBW) retains it in Amazilia. At one time the species was treated as a subspecies of the blue-headed hummingbird (C. grayi).<p>Humboldt's sapphire is monotypic.
- 学名
- Chrysuronia humboldtii
- 命名信息
- (Bourcier & Mulsant, 1852)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Chrysuronia
分布与栖息地
Humboldt's sapphire is found in a narrow Pacific coastal band from extreme southeastern Panama through western Colombia into northwestern Ecuador's Esmeraldas Province. It inhabits mangroves and adjacent wet secondary forest, mostly below 50 m (160 ft) of elevation. It is most common in stands of Pacific (or tea) mangrove (Pelliciera rhizophorae).
- 迁徙
- Resident species
行为
The movements of Humboldt's sapphire, if any, have not been documented.<p>The Humboldt's sapphire's preferred nectar source is the flowers of tea mangrove, though it has been observed feeding at flowering trees, shrubs, and herbs near the mangrove belt. In addition to nectar, it feeds on insects taken by hawking from a perch or by gleaning from vegetation.<p>Humboldt's sapphires in breeding condition have been noted between January and May. Males gather at leks to sing to females. No other information on the species' breeding phenology is known and its nest has not been described.<p>Xeno-canto and Cornell University's Macaulay Library have only a few recordings of Humboldt's sapphire vocalizations. What is thought to be its song is "a repeated high-pitched phrase comprising hissing notes and trills, 'tee-tsee-see-tsee-see-trtrt-tsee-see-trtrt'." It also makes "a descending squeaky twittering" call.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Gundlach's Hawk
Astur gundlachi
A secretive raptor of wooded habitats including mangrove swamps. Though this species sometime soars, its flight is usually powered by several rapid flaps followed by a brief glide. In flight, note the long rounded tail, short rounded wings, and a large head that protrudes well in front of the wings. Adults are barred orange below while immatures are streaked brown. The similar Sharp-shinned Hawk is somewhat smaller in body and head and has a shorter, squared-off tail. Migrant Sharp-Shinned Hawks from North America are scarce within this species’ range, and are best told by structure and size. Resident Sharp-shinned Hawks, which share this species’ range are conveniently barred gray below. Immature Sharp-shinned Hawks can also be distinguished from Gundlach’s by their narrow, but distinct white eyebrow. The Broad-winged Hawk is somewhat similar, but it is much shorter tailed and somewhat longer winged. The common call is an emphatic “eh-eh-eh-eh-eh…,” with the first couple notes quieter than rest.
Warsangli Linnet
Linaria johannis
A fine-billed finch with a notched tail. Neatly patterned mostly in gray and white, with black wings and tail and a rufous lower back and thighs. Male has a striking white eyebrow, lower cheek patch, wing notch, and rump. Female is duller, with a less striking facial pattern; juvenile is buffier and streakier. A rare resident in the hilly Daalo and Mash Caleed regions of northern Somalia, where it prefers degraded juniper forest and other woodland and scrub between 1200 and 2400 meters of elevation. Forages on the ground in pairs or small groups, and perches on exposed branches and dead trees. Sings a typical canary-like song with whistles, trills, and buzzes. Calls include a high-pitched “tsee-wit.” Streaky juvenile could be confused with a canary, but white in the wing is distinctive.
Blue Jay
Cyanocitta cristata
Familiar but stunning jay found year-round throughout most of eastern North America. Bright blue above and pale gray below with a fluffy crest. Also look for black necklace and black and white markings on the wings and tail. Pairs or small groups travel through mature deciduous or coniferous woodlands, often revealing their presence with loud, harsh “jay” calls. Frequently visits bird feeders, where it is often aggressive towards other birds.
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