Eastern Chanting-Goshawk
Melierax poliopterus
An attractive, medium-sized, long-tailed raptor. Mostly gray with a black uppertail and wingtips. There is yellow bare skin at the base of the bill, and the legs are red. Immature birds are mostly brown. Found in dry savanna and thornscrub, alone or in pairs. Similar to Dark Chanting-Goshawk; adults separated by their yellow facial skin, and both adults and immatures by their white rather than barred gray rump patch, which is obvious in flight. The calls include a long squeal and a chanting series of “pwek” notes.
识别特征
This species averages 49 to 55 cm (19 to 22 in) long, with a wingspan of 96 to 110 cm (38 to 43 in) and a tail length of 20 to 25 cm (7.9 to 9.8 in). Males average 85 percent the size of females. Like the other chanting goshawks, it resembles an accipiter but the tail is shorter and graduated (the feathers increase in length from the edges to the center), and the wings are broader.<p>Adults have grey head, neck, breast, and upperparts, except for the white or lightly barred uppertail coverts. The belly has narrow grey and white bars and the undertail coverts are white. The belly and wing linings are white, the secondaries are light grey, and the primaries are dark, giving an impression from below of a white bird with grey head and dark wingtips. The tail is blackish above and white below with grey bars. The cere is yellow, and the legs are orange-red. Juveniles are dull brown above with a pale stripe over the eye. They have white underparts with brown streaks on the throat and breast, brown bars on the belly coverts, and faint or no barring on the undertail coverts. The tail is brown with widely spaced darker brown bars. The rump is white, partially barred or unmarked. They are indistinguishable from some juvenile dark chanting goshawks except for the less barred undertail coverts and rump. Also, the legs are slightly longer at all ages than the dark chanting goshawk's.
分类信息
This species is intermediate between the smaller dark chanting goshawk (widespread to the west and south) and the pale chanting goshawk (southern Africa) in colour, size, and leg length, but not in range. It has often been considered a subspecies of the latter, but because of this disparity between geography and characters, it is now considered a separate species, as agreed by many authorities.
- 学名
- Melierax poliopterus
- 命名信息
- Cabanis, 1868
- 目
- Accipitriformes
- 科
- Accipitridae
- 属
- Melierax
分布与栖息地
It is often found in semidesert, dry bush, and wooded grassland up to 2000 m in southern Ethiopia, Djibouti, western Somalia, eastern Kenya, northeastern Tanzania, and adjacent Uganda.
- 迁徙
- Resident species
行为
The eastern chanting goshawk is usually seen in large groups of up to 16, they will always hunt in a pack and ration their finds amongst each other. It often perches on the tops of mountains and other rocky environments. Its wingbeats are shallow and "straight-arm". It holds its wings flat, or sometimes in a C, when it glides.<p>Its calls are "a melodious piping rhee-opee-opee-opee, and a short low-pitched kleee-yeu", slightly higher-pitched than those of the dark chanting goshawk, or "pereu-pereu-pereu-repee-repee-repee-repee..." in the nesting season, the source of its name.<p>It will hunt large insects, such as beetles, small to medium-sized birds (such as doves), and rodents. However, its favorite prey seems to be lizards which it will often snatch up off the ground after swooping down upon them from an exposed perch. Though not common, this species will also feed on carrion from time to time.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Crimson Sunbird
Aethopyga siparaja
A common sight throughout much of its range, this medium-sized sunbird can be found in parks, gardens, and plantations, as well as more pristine open forest and forest edge environments. Male is bright red with a dark gray belly and iridescent blue cap and “moustache.” Female is dull olive-yellow overall with brighter underparts. High, squeaky repetitive song is loud but often difficult to locate in high branches. Calls frequently, giving various squeaks and “tsip” notes while foraging.
Tumbes Hummingbird
Thaumasius baeri
A plain hummingbird found in dry forest and scrub in southwestern Ecuador and northwestern Peru. It is dull green with light gray underparts, a white spot behind the eye, and a thick, slightly curved bill. Some birds show very faint spots on the throat. Similar to Spot-throated Hummingbird, but throat markings are much less conspicuous or entirely absent. Ranges are also different; Tumbes Hummingbird is found only on the Pacific side of the Andes and does not reach the Marañon drainage.
Buru Golden-Bulbul
Hypsipetes mysticalis
A thrush-sized olive-colored songbird with a long, fairly heavy bill. Plumage uniform olive-green except for narrow yellow chin, yellow patch between the bill and the eye, and partial yellow eye-ring above the eye. Pairs or small groups occupy forest, degraded forest, edges, and plantations from sea level to foothills. Unmistakable; limited to the island of Buru. Song starts with several soft “pip” or “chek” notes, then explodes in a series of variable whistles, e.g. “WEE-WEE-WEE-WEK-pewee-pewee-WEE-WEE.” Calls include dry “chek” notes and rasping “chirrrik” calls.
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