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
Genus: Ducula; Family: Columbidae; Order: Columbiformes.
- 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
行为
Migration pattern: Resident species.
保护状况
Population trend: rising.
- 种群趋势
- rising
照片
分布
其他鸟类
Western Hooded Pitta
Pitta sordida
Widespread and beautiful, this jewel of a bird bounces about on the shaded forest floor like a luminous ball, where it can be surprisingly difficult to spot. If seen, note emerald-green body, black head, ruby-red lower belly, and powder-blue wing patch. Birds from the Himalayas east to much of mainland Southeast Asia have a warm brown crown stripe; these birds are migratory, and may turn up in unexpected places, such as city parks. Listen for loud, barking song in a range of wooded habitats, from deep forest to plantations. Formerly grouped together with several other closely related species as “Hooded Pitta.”
Ashy-crowned Sparrow-Lark
Eremopterix griseus
A small, stocky bird with a heavy, finch-like bill. Males have a gray head that contrasts with a black eye-stripe, and black on the collar, throat, and underparts. Females are pale brown with weak streaks on the head, back, and underparts. Similar to Black-crowned Sparrow-Lark, but Ashy-crowned males are told apart by the gray on the head. Females are difficult to distinguish. Inhabits dry scrub, fields, and rocky country. The song is often given in display flight, and consists of monotone whistles interspersed with buzzy notes.
Greenish Schiffornis
Schiffornis virescens
Medium-sized olive green bird with a small head, massive eyes, and a short stocky bill. Olive-green apart from brownish wings and tail. Very secretive; found in the understory and middle levels of humid forests and second growth. The song is a loud double whistle.
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