Nuku Hiva Imperial-Pigeon
Ducula galeata
A large pigeon with a mostly dark gray body and a greenish back and wings. Head appears elongated, with a fleshy saddle at the base of the bill. Chestnut rear underside is most obvious in flight. Resident in remote forested valleys above 700 meters of elevation. Most common vocalisation is a very harsh, crow-like “krrrahhh,” most often heard in the early morning.
识别特征
This is the largest pigeon outside of the crowned pigeons, as it weighs approximately 900 grams (2 lb). Females, at 50 to 53.5 cm (19.7 to 21.1 in) long, are slightly smaller than males, at 55 cm (22 in) in length. Among standard measurements, the wing chord is 27.8–32.1 cm (10.9–12.6 in), the tail is 18.1–23.1 cm (7.1–9.1 in), the bill is 1.9–2.7 cm (0.75–1.06 in) and the tarsus is 3.9–4.6 cm (1.5–1.8 in). This species is heavily built with a large bill and long, broad tail. The wings are broad and rounded in shape.<p>The Marquesan imperial pigeon is sooty-gray on the head, throat and breast, with a white band just behind the bill that can be seen from some distance. The belly is slightly browner in color than the rest of the underside. The upperparts, wings and tail are glossy green with a bluish tint. The underside of both the tail and the wings are black. The bill is black, with a swollen cere that gives the face a unique sloping look just above the bill.<p>This bird has an cooing advertising call that consist of a loud, deep, guttural 'neah-ah, neah-ah, neah-ah, neah-ah or naw-aw, naw-naw or uh-wah, uh-wah, uh-wah. This call is so deep in timber that it is sometimes described as cow-like. A call, probably consisting of an excitement call, has been described as a crow-like krawk, krawk.
分类信息
- 学名
- Ducula galeata
- 命名信息
- (Bonaparte, 1855)
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Ducula
分布与栖息地
This was originally distributed throughout its native island, which at one time was almost completely covered in forest. Now it is basically restricted to woodland from 200 to 1,500 m (660 to 4,920 ft) above sea-level. A few on the island may still turn in sea-level forested groves and woods surrounded banana and orange plantations. Before ancient Polynesian settlers arrived there, subfossil bones show there was also a population of this bird on Henderson Island in the Pitcairn Islands.
- 迁徙
- Resident species
保护状况
- 种群趋势
- rising
照片
分布
其他鸟类
Yellow-bellied Flyrobin
Cryptomicroeca flaviventris
Small mostly grayish songbird with an upright posture and short bill. Note bright yellow belly and small patch of whiter feathers on the throat. Typically found low in dense growth, preferring areas of native habitat including stunted forest and edges. Pleasant song a combination of higher-pitched wheezing whistled notes and lower chiming warbles.
Chinese Blue Flycatcher
Cyornis glaucicomans
One of a number of confusingly similar blue flycatchers. Male is brilliant blue above with orange throat and breast; note off-white lower belly. His dark orange throat distinguishes him from Blue-throated Blue Flycatcher. Female is drab brown with an orange chest, white belly, and dull rufous tail. Note weak orangish eyering, dull tannish throat, and overall warm brown coloration. Brown flanks in both sexes. Breeds in montane and hilly forest, typically in areas with dense undergrowth; winters at lower altitudes. Musical song is composed of trills and whistles; calls are a hard “tak” or “chek.”
White-shouldered Antshrike
Thamnophilus aethiops
Shy antshrike found in understory of lowland and foothill rainforest. Male is dark gray or black; he also has small white dots on the shoulder and a white line at the bend of the wing, but these features are not always evident in the field. Female is plain brown; on the western edge of the range, she also has a black face, throat, and tail. Usually first detected by voice: song is a soft series of evenly spaced, nasal caws.
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