Plush-crested Jay
Cyanocorax chrysops
Large and striking dark blue jay found in various forest and woodlands types where it is often encountered in noisy groups of up to a dozen or so. Note the odd, rounded black crest, black head and breast that contrasts with yellow eyes and a bright blue eyebrow and nape. The lower belly and the lower half of the tail are white while the upperparts are dark blue.
识别特征
The plush-crested jay is a medium-sized bird with an overall dark blue colored plumage. It has a cream-yellow underbelly, undertail coverts, underwings, and tail tip, while the upper breast, neck, and head are mostly black. It has a lighter blue on its cheeks and nape, which fades into the darker blue of its body, as well as a spot above its eyes, which are yellow. Its bill is dark blue to black. It has a rounded crest on its head, which it is named for.
分类信息
- 学名
- Cyanocorax chrysops
- 命名信息
- (Vieillot, 1818)
- 目
- Passeriformes
- 科
- Corvidae
- 属
- Cyanocorax
分布与栖息地
The range of the plush-crested jay extends from the Southern Region, Brazil with Uruguay and approaches the South Atlantic coast, but avoids the coast, approximating a 400 to 150 km coastal strip; the coastal-inland range extends 3500 km from São Paulo south to Rio Grande do Sul bordering Uruguay. The inland range continues in northwestern Uruguay and extends northwest through northern Argentina, Paraguay–Bolivia, and through the Pantanal at the southern Cerrado; the range extends in two arms, to the northwest to northern Bolivia, and northeastwards to headwaters of the Amazon Basin Tapajós River.<p>In the Amazon Basin, central Bolivia is the northwest range limit, the headwater tributaries to the north-northeast flowing Madeira River; the next range skips the Guaporé River, (a northwest-flowing tributary to the Madeira), eastwards on the Brazil–Bolivia border, and is next found at the headwaters of the Tapajós River, and joins on the east the extreme headwaters of the Xingu River.<p>A disjunct range occurs downstream on the Tapajós and east towards the Xingu River, a block 850 by 750 kilometres (530 mi × 470 mi). Two other localized populations occur in the Amazon Basin, one on the Amazon River, the other on the downstream Madeira River.
- 迁徙
- Resident species
行为
The plush-crested jay is a non-migratory bird that is known to form flocks of 3-10 on average, sometimes including other species. This flock will typically have a few breeding pairs, and the social hierarchy is headed by the breeding female(s). They will typically create nests in trees, consisting of twigs, sticks, roots, and other fibers, where the female will spend most of her time while brooding. Caring for nests and young is often communal.<p>While foraging for food, they will stay on the ground or occasionally forage in trees for food. They have also been observed following ants back to their nests, either to eat them or other insects nearby.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Plain-tailed Wren
Pheugopedius euophrys
Bamboo-loving wren of the Andes known for its beautiful song duets. Plumage and song vary geographically. All birds are brown and gray overall with black and white face and mustache stripes. In most of Ecuador and in southwestern Colombia, it has black spots or speckles on its breast. Elsewhere it lacks breast markings and has a black crown. Pairs skulk in dense bamboo, and their loud, whistled song duets carry over long distances.
Somali Grosbeak
Rhynchostruthus louisae
Handsome chunky gray-brown finch with a massive dark bill, dark-brown cap, and blackish face mask extending to the throat. Female has a paler forehead and crown. Juvenile is streaky with a more diffuse mask. Ecology is poorly known but presumed to be similar to that of Arabian Grosbeak, with pairs and small groups frequenting thorn-scrub and riverine vegetation up to 1400m in the northern Somali mountains, where it is a scarce endemic. Vocalizations largely unknown, but presumed to be similar to those of Arabian Grosbeak. In addition to range, other “golden-winged” grosbeaks differ from Somali in having pale ear-patches.
Plumbeous Seedeater
Sporophila plumbea
A small finchlike species with a short and stubby bill. Males are mostly gray with a white chin and central belly with white spots on the wings. Females are olive-brown above and buff below, and lack the white wing spot. Inhabits tall mature grasslands, often near water; often forms flocks with other seedaters.
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