White-throated Hummingbird
Leucochloris albicollis
Very distinctive humminbird; both sexes have mossy green bodies and bold white throats and bellies. The bill is bicolored with a red lower mandible. Found in a variety of habitats such as forest edge, plantations, and gardens, mostly in the lowlands. Often visits feeders. Call is an irregular dry “chip.”
识别特征
The white-throated hummingbird is 10 to 11.5 cm (3.9 to 4.5 in) long. Males weigh 5 to 8 g (0.18 to 0.28 oz) and females about 4.5 g (0.16 oz). Adults have a medium length, straight, bill with a blackish maxilla and red mandible with a black tip. Adult males have golden- to bronze-green upperparts. Their uppertail coverts and inner tail feathers are golden-green to brilliant green and the outer tail feathers blackish green with white bands near the end. Their chin feathers are brilliant green with white edges, their throat white, and their cheeks and breast brilliant green to golden-green. The center of their belly is white with golden- to bronze-green sides and flanks. Their undertail coverts are white with some bronze-green to brownish inclusions. Adult females are very similar but duller, less glittery, overall. Juveniles have grayish brown underparts with less white and brownish tips to the tail feathers.
分类信息
French ornithologist Louis Pierre Vieillot described the white-throated hummingbird in 1818 as Trochilus albicollis. Its species name is derived from the Latin words albus "white" and collum "neck". Ludwig Reichenbach erected the genus Leucochloris in 1854, deriving the name from the Ancient Greek leukos "white" and chloros "green".<p>The white-throated hummingbird is the only member of its genus and has no subspecies.
- 学名
- Leucochloris albicollis
- 命名信息
- (Vieillot, 1818)
- 目
- Apodiformes
- 科
- Trochilidae
- 属
- Leucochloris
分布与栖息地
The white-throated hummingbird is found in eastern Paraguay, southeastern Brazil from Minas Gerais and Espírito Santo south, Uruguay, and northeastern Argentina. It inhabits semi-open to open landscapes such as the edges of mature forest, marshes, scrublands, parks, and gardens. In elevation it is generally found from near sea level to 1,000 m (3,300 ft) but there are occasional records higher with one at 2,100 m (6,900 ft).
- 迁徙
- Complete migrants
行为
The white-throated hummingbird is mostly sedentary but some local dispersal has been noted.<p>The white-throated hummingbird forages for nectar at a very wide variety of native and introduced plants. Species from at least 10 families have been documented as sources. Bromeliaceae seem especially favored; examples include Quesnelia testudo and Tillandsia aeranthos. It is known to pollinate Siphocampylus sulfureus. In addition to nectar it feeds on insects captured by hawking from a perch.<p>The white-throated hummingbird's breeding season spans from October to March. It makes a cup nest of plant down and moss bound with spiderweb with lichen on the outside. It is typically placed on a horizontal branch of a shrub or small tree. The female incubates the clutch of two eggs for about 14 days and fledging occurs 20 to 25 days after hatch.<p>The white-throated hummingbird's song is "a series of 4–10 high-pitched, buzzy notes, with emphasis on the first, 'bzeeeee-bzee-bzee-bzee-bzee'." It also makes calls described as "dry chips and a high-pitched descending metallic rattle."
保护状况
- 种群趋势
- unknown
照片
分布
鸟叫声
其他鸟类
Tawny-capped Euphonia
Euphonia anneae
Small finchlike bird, compact and short tailed. Generally yellow below and dark blue-black above with stout, short bill. To identify male euphonias, focus on crown and throat: on Tawny-capped, crown is entirely russet-orange and throat is dark. Female shows a more limited orangey forehead, which narrows down the options. Also note grayish (not olive or brown) belly. Often in pairs or small flocks with males, which makes identification easier. Frequents forested habitats and edges. Can form mixed feeding flocks with other species such as warblers and tanagers.
Sooty Shearwater
Ardenna grisea
Medium-sized, dark brown shearwater with silvery flashes on underwings. Narrow wings with quick, deep wingbeats. Widespread and common, especially in the Pacific; can sometimes be seen close to shore. Can be in massive flocks. Extremely similar to Short-tailed Shearwater, but Sooty is heavier and has straighter wings; also look for slightly longer bill and less rounded head. Brown plumage is reminiscent of Flesh-footed Shearwater, but Sooty is narrower-winged and has a smaller, all-dark bill.
Malagasy Brush-Warbler
Nesillas typica
Medium-sized brown bird with a long, spiky tail. Found in a wide variety of moist and woody habitats, including rainforest, wet scrub, plantations, and gardens. Absent or very local in much of west and southwest Madagascar. Skulks in thick undergrowth. Incessantly given call is a Geiger counter-like ticking. Darker brown than Subdesert Brush-Warbler, with a lower-pitched call and little overlap in range. Similar to Madagascar Swamp-Warbler, but has less distinct breast streaking and white eyebrow, and is generally found in scrub rather than marsh.
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