Island Imperial-Pigeon
Ducula pistrinaria
A large, long-necked pigeon, more uniformly gray than other imperial-pigeons in the region. Overall very pale, with a dark blue tail, a pinkish wash to throat and chest, and a gray back and wings. Birds in the Admiralty Islands have green wings and back. Relatively coastal, preferring smaller islands. Perches conspicuously in the open. Similar to Pacific Imperial-Pigeon, but overall paler. Birds on the Admiralty Islands differ from juvenile Red-knobbed Imperial-Pigeon in their gray, not cinnamon, belly and underside. Normally heard giving a high-pitched “ahu ahu ahu ahu” call, falling in pitch and volume.
识别特征
The island imperial pigeon is about 39–45 cm (15–18 in) long and weighs 470–500 g (17–18 oz). The head and neck are pale grey, and there are white spectacles. The upperparts are glossy. The wing coverts and tertials are grey-green, and the primaries and secondaries are blackish. The back is grey-green. The uppertail is dark blue-green, and the undertail is chestnut. The throat is vinous, the breast is greyish-vinous, and the belly is greyish-fawn. The beak is slaty-blue, having a black tip. The eye is dark red or brownish, and the feet are red. The juvenile bird is duller and buffier. The subspecies have different sizes and glosses.
分类信息
This species was described by Charles Lucien Bonaparte in 1855. The following subspecies are recognised: Ducula pistrinaria rhodinolaema, D. p. vanwyckii, D. p. postrema and D. p. pistrinaria.
- 学名
- Ducula pistrinaria
- 命名信息
- Bonaparte, 1855
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Ducula
分布与栖息地
This pigeon is found in the Bismarck Archipelago, the Solomon Islands archipelago and small islands to the north and east of New Guinea. Its habitat is coastal primary forest, old secondary forest, mangroves and some disturbed habitats.
- 迁徙
- Nomadic movement
行为
One or two birds and small flocks are usually found; large flocks are occasionally seen. The pigeon flies swiftly and directly. It plucks fruits from branches in the canopy, and it flies across the sea to search for food. Its calls include a rising and repeated c-wooooohooo given when the bird is upright, a loud series of descending coos while bobbing up and down, and a high-pitched crrrrrurrr. In display, it flies up at an angle of 70° and then glides. Breeding has been observed from June to September and in March. The nest is built at the end of a branch and made of twigs. One egg is laid.
保护状况
- 种群趋势
- declining
照片
分布
其他鸟类
Blue Paradise-Flycatcher
Terpsiphone cyanescens
A medium-sized, long-tailed bird of lowland forest understory on Palawan and neighboring islands. Has a blue bill, eye-ring, chest, and head with a slight crest at the back. Back, wings, and tail are blue in the male and rufous in the female. Female is distinctive. Male is similar to Black-naped Monarch, but larger, and lacks the black mark on the back of the head. Song consists of a rapidly pulsating series of fairly high-pitched nasal notes that increase in volume.
Squirrel Cuckoo
Piaya cayana
Very striking and long-tailed bright rusty cuckoo, widespread in tropical lowlands and locally up into foothills. No similar species in Mexico and Central America. Occurs in a wide range of wooded and forest edge habitats. Mostly forages stealthily at mid-upper levels in trees, where can be surprisingly difficult to see. Often seen swooping across roads and eliciting a ‘wow’ reaction. Underside of white-tipped tail feathers is rusty overall in West Mexico, blackish overall in other areas.
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.
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