Red-shouldered Macaw
Diopsittaca nobilis
Small macaw, easily confused with a large parakeet. Largely green apart from a contrasting bare white face, blue crown, and red shoulders. The bill varies in color between regions; all dark in the northern subspecies, with a paler upper mandible and dark lower mandible in other subspecies. Typically found foraging in groups or pairs in savannas, palm groves, and occasionally in urban areas. Has a loud rasping call.
识别特征
The red-shouldered macaw, at 30 cm (12 in) long and 165 g (5.8 oz) weight, is the smallest of all the macaws. Like all macaws, it has a long narrow tail and a large head. It has bright green feathers on the body, with dark or slate blue feathers on the head just above the beak. The wings and tail have feathers that are bright green above and olive-green below. The leading edges of the wings, especially on the underside, are red. (These red feathers appear at puberty.) Their eyes are orange, and the skin around the eyes is white without feathers, just as in the larger macaws. This bare patch of facial skin is smaller in proportion to the head than the one seen in most larger macaws. The Hahn's macaw and noble macaw can be distinguished by the Hahn's having a black upper mandible and the Noble's having a lighter, horn-colored upper mandible.<p>Their natural vocalizations are more akin to screeches than they are to whistles.
分类信息
The red-shouldered macaw was formally described in 1758 by the Swedish naturalist Carl Linnaeus in the tenth edition of his Systema Naturae. He placed it with all the other parrots in the genus Psittacus and coined the binomial name Psittacus nobilis. The red-shouldered macaw is now the only species placed in the genus Diopsittaca that was introduced in 1912 by the American ornithologist Robert Ridgway. The genus name combines the Ancient Greek dios meaning "noble" with psittakē meaning "parrot". The specific epithet noblilis is Latin meaning "noble". There are two distinct subspecies, D. n. nobilis (Hahn's macaw) and D. n. cumanensis (noble macaw), and some with longer wings might represent a poorly differentiated subspecies, D. n. longipennis, which intergrades with D. n. cumanensis in central Goiás, Brazil. The species is sometimes subsumed into the genus Ara.<p>Taxonomy proposed by BirdLife International splits the red-shouldered macaw into two species.
- 学名
- Diopsittaca nobilis
- 命名信息
- (Linnaeus, 1758)
- 目
- Psittaciformes
- 科
- Psittacidae
- 属
- Diopsittaca
分布与栖息地
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Wedge-billed Woodcreeper
Glyphorynchus spirurus
Very small woodcreeper of evergreen forest in humid tropical lowlands and foothills. Creeps up trunks, often in spirals, picking at the bark for food, then flies low to another tree before hitching upwards again. Forages on fairly large trunks as well as slender trees. Often travels with mixed-species feeding flocks. Note the short, wedge-shaped bill and pale buffy breast spotting.
Northern Brownbul
Phyllastrephus strepitans
A drab, long-tailed brownish bird related to greenbuls. The tail is rufous and the throat paler buff. Found in scrub, thickets, and areas of dense woodland, almost always in small and vocal groups. The loud calls are rollicking series of babbling calls, somewhat similar to both woodhoopoe and babbler vocalizations. Very similar to Terrestrial Brownbul, but throat patch is much duller instead of bright white, and tail is more rufous. Also similar to Fischer’s Greenbul, but has dark rather than pale eyes. Separated from other greenbuls by the lack of olive-green in the plumage.
Slaty Egret
Egretta vinaceigula
A small, dark egret with a rusty-buff throat and yellow-green legs and feet. It occurs solitarily or in small groups, preferring marshes and floodplains; it avoids open areas, seeking cover in small channels or near long grass. Slaty Egrets walk slowly, shuffling their feet to surprise fish and frogs. Although it is mostly resident, it can disperse widely outside of its core range. The similar Black Egret differs by having a dark throat, dark legs with yellow feet, and occasionally foraging in a distinctive “umbrella” position, whereby it covers its head with its wings.
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