Violaceous Jay
Cyanocorax violaceus
Large, dark jay with vibrant blue plumage and a black head and bib. Frequents a variety of open habitats, including forest edges, gardens, and agricultural areas. Often particularly common in vegetation along rivers and other waterways. Distinguished from similar Purplish Jay by its brighter blue plumage and contrasting pale nape. Also listen for a high-pitched, piercing “jeer.”
识别特征
This is a medium-large jay with dull violet-blue plumage and a striking dark face and throat. The purplish jay (with which it overlaps in southeastern Peru and in northern Bolivia) is duller (more purplish or brownish blue, less violaceous blue) and the nape is not paler than the back. In eastern Colombia and southern Venezuela, the azure-naped jay is distinguished by its pale iris, white undertail coverts and tip to the tail, paler nape, and short frontal crest. The violaceous jay is 33–38 cm (13–15 in) long and weighs 262 grams (9.2 ounces).)
分类信息
- 学名
- Cyanocorax violaceus
- 命名信息
- Du Bus de Gisignies, 1847
- 目
- Passeriformes
- 科
- Corvidae
- 属
- Cyanocorax
分布与栖息地
The range of the violaceous jay is the southwest and northwest Amazon Basin, from northern Bolivia, through Amazonian eastern Peru and Ecuador, Amazonian Colombia, and the Orinoco River Basin and beyond into northern Venezuela. The range is east of the Andes cordillera, except in the north in Colombia and Venezuela. In southwest Guyana, (the southwest Guiana Shield), the range borders Roraima state, Brazil and the Amazon River, (Rio Negro), tributary, the south-flowing Branco River of central Roraima.<p>In Brazil's western Amazon Basin, the violaceous jay is found in Roraima, Amazonas, and Acre state, the west of North Region, Brazil.
- 迁徙
- Resident species
行为
The violaceous jay is omnivorous, mainly consuming fruits, insects, and bird and reptile eggs. It is also known to take small lizards as well.<p>Little is known in any detail about the violaceous jay's life history. Violaceous jays in Venezuela forage chiefly in the middle and upper canopy (above 18 meters) in a mature tropical evergreen rainforest. They take food items by hopping along limbs and gleaning for prey. It forages in flocks in forest canopy, and rarely lingers in one spot for long. These flocks often are noisy, but like other jays, the violaceous jay can be quiet and inconspicuous at times. They are known to frequently mob potential predators.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Eastern Dwarf Hornbill
Horizocerus granti
A small, dark forest hornbill found predominantly in primary forest subcanopy, where it prefers areas with abundant vines. This species is unique in its overall dark coloration and its broad white eyebrow that extends to the back of the head. The only similarly-sized forest hornbill in its range is the more reddish Red-billed Dwarf Hornbill, but Eastern Dwarf Hornbill has a less well-defined border between the dark chest and white belly, and only Eastern Dwarf Hornbill has the broad white eyebrow behind the eye. Voice is a repetitive “yep yep yep yep” that can be repeated at length, sometimes accompanied with a howl.
Red-cheeked Cordonbleu
Uraeginthus bengalus
Slim, long-tailed, pretty waxbill. The upperparts are pale brown and the underparts and tail blue. Males have a distinctive magenta mark on the cheek. Generally common in a wide variety of open habitat, including dry thornscrub, all types of savanna, villages, and cultivation. Usually in pairs or small flocks. The common call is a high-pitched “tsee-tsee.” In the area of overlap, females are very difficult to separate from Southern Cordonbleu. They tend to show more extensive brown on the cheek, but are most safely identified by association with red-cheeked males.
Townsend's Storm-Petrel
Hydrobates socorroensis
Endangered seabird found in the Pacific Ocean well off the coast of Mexico and southern California. It breeds in summer on small islets near Guadalupe Island, located 160 miles from Baja California, and disperses northward and southward at other times of the year. Plumage is dark gray with a notched tail and pale stripes on the upperwing; rump may be either dark or white. Flies erratically and often patters the ocean with its feet. Very similar to Leach’s Storm-Petrel, which also has white- and dark-rumped forms, but it is smaller and darker with more rounded wings and less contrasting wing stripe. Also very similar to Ainley's Storm-Petrel, but keep in mind that Ainley’s has not yet been recorded in US waters.
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