Glaucous-blue Grosbeak
Cyanoloxia glaucocaerulea
A medium-sized bulky finchlike species with a small head and a thick bill. Males are blue overall with a glossy blue forehead and rump. Females are dark-brown above and paler below. Found at the edges of second growth and woodlands, typically singly or in pairs and normally very shy. Considered a partial austral migrant, moving a bit further north from the southern limit of its range in winter.
识别特征
The glaucous-blue grosbeak is approximately 14 cm (5.5 in) long. Three birds weighed from 16 to 19.5 g (0.56 to 0.69 oz). The male is generally dark sky blue that is lighter on the forehead and rump and is grayish on the lower belly. It has a small black "mask". The female is brown overall, warm and dark above and orange-tinged below. The immature is orange-brown that is darker on the back, and it has a hint of blue on the forehead and cheek.
分类信息
The glaucous-blue grosbeak is monotypic.<p>For much of its history, the glaucous-blue grosbeak was the only member of genus Cyanoloxia. Following a 2004 publication, the blue-black grosbeak (now Cyanoloxia cyanoides) and ultramarine grosbeak (now Cyanoloxia brissonii) were moved from genus Cyanocompsa. What is now Amazonian grosbeak (Cyanoloxia cyanoides) was later split from blue-black grosbeak.
- 学名
- Cyanoloxia glaucocaerulea
- 命名信息
- (d'Orbigny & Lafresnaye, 1837)
- 目
- Passeriformes
- 科
- Cardinalidae
- 属
- Cyanoloxia
分布与栖息地
The glaucous-blue grosbeak nests in northeastern Argentina, southeastern Brazil, and much of Uruguay. During the austral winter, some move into southeastern Paraguay and further north in Brazil. It inhabits low, somewhat dense, vegetation such as along forest edges, on river islands, in marshes, and in secondary forest. In elevation it ranges from near sea level to 1,700 m (5,600 ft) in Brazil.
- 繁殖区
- SA : e Paraguay, ne Argentina and s Brazil
- 非繁殖区
- to Uruguay and e Argentina
- 迁徙
- Complete migrants
行为
Migration pattern: Complete migrants.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Chestnut-bellied Nuthatch
Sitta cinnamoventris
Often seen clambering up or headfirst down trees, this small active bird is usually found in the middle levels of the forest, though it will descend down toward the ground on occasion. Gray above and warmly-colored below throughout its range; eastern birds are paler below than western birds, the males of which have dark rusty bellies. Western birds also sport a bright contrasting white moustache. Lack of bright white patch on the tail distinguishes this species from White-tailed Nuthatch. A species of hill and submontane forests, where it favors lightly wooded areas of both broadleaf deciduous and pine forests. Often detected by its quick, echoing trill.
Brown-rumped Seedeater
Crithagra tristriata
A plain seedeater of the Abyssinian highlands. Note the gray-brown back, the paler underparts, the white eyebrow, and the small white throat. Generally common in a variety of montane habitats including forest edge, woodland, scrub, and gardens. Similar in overall coloration to Reichard’s and Streaky Seedeaters, but easily separated by the plain unstreaked underparts. The simple song consists of repeated scratchy whistles.
Brown-capped Tyrannulet
Ornithion brunneicapillus
Tiny short-tailed flycatcher. Yellow below with white eyebrow that wraps around the forehead. No wingbars. Very similar to Yellow-bellied Tyrannulet, but note brown crown (not gray). Voice is also distinctive: a series of plaintive clear whistles descending in pitch. Found singly or in pairs, usually in the forest canopy, where it can be difficult to spot given its small size. Sometimes joins a mixed-species flock.
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