Greater Kestrel
Falco rupicoloides
Large pale-brown kestrel. Gray tail has broad black bands, and the back is heavily marked with black. Found in semi-desert, grassland, and arid savanna. Often perches conspicuously in an isolated tree. Calls are high-pitched squealing notes and much lower barks. Larger than all other kestrels, but similar in size to smaller falcons. Uniform brownish color is distinctive.
识别特征
The plumage of the adult is mainly pale rufous, both above and below. The back, upperwing and flanks are barred with black. The breast has dark streaks and the head is streaked but has no malar stripe unlike the common and lesser kestrels. The rump and tail are grey with black bars; the tail has a white tip. In flight, the whitish underwing contrasts with the darker body. The iris of the eye is whitish, distinguishing the bird from any similar species. The bill is mainly blue-grey and the feet and cere are yellow. Juvenile birds have rufous instead of grey on the tail, streaked flanks and a dark eye.<p>The bird is 29–37 cm (11–15 in) long with a wingspan of 68–84 cm (27–33 in) The southern subspecies F. r. rupicoloides weighs about 181–334gr (.400–.736 lb). The form F. r. arthuri is smaller, weighing about 165–252gr (.364–.556 lb). The northern subspecies F. r. fieldi is also small and is paler than the others.<p>The species is usually silent but has a shrill, repeated call.
分类信息
- 学名
- Falco rupicoloides
- 命名信息
- Smith, A, 1829
- 目
- Falconiformes
- 科
- Falconidae
- 属
- Falco
分布与栖息地
It occurs in open, arid areas where it inhabits grassland, savannas and semi-desert. It is often associated with acacias. It prefers areas where the ground cover is lower than 50 cm. It is found from sea-level up to 2150 metres, particularly between 800 and 1800 metres.<p>It is fairly common and widespread in the southern parts of its range but is scarce and patchily distributed further north. The form F. r. rupicoloides breeds in Namibia, Botswana, Zimbabwe, parts of Angola and Zambia and in much of South Africa apart from the wetter regions of the south and east. F. r. arthuri is found in Kenya and northern Tanzania while F. r. fieldi occurs in Ethiopia, Eritrea, northern Somalia and probably northern Kenya.<p>The total range covers about 3.5 million km2. The population is stable and is likely to be in the order of 100,000 to 200,000 pairs. Most birds are sedentary but some are nomadic or dispersive.
- 迁徙
- Resident species
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Black-faced Firefinch
Lagonosticta larvata
An unusual and distinctive firefinch with very different male and female plumages. Males have a black face, while the color of the underparts varies geographically from pale gray to pale pink to rosy red. Females are mostly gray-brown with a reddish tint to the underparts and a pale undertail. Generally uncommon in woodland, grassland, and thickets, often near water. Sometimes mixes with other waxbills. The female is similar to other female firefinches, but is separated by its combination of a pale undertail and dark bill. The common calls are soft, repeated whistles.
Ash-throated Casiornis
Casiornis fuscus
Large rufous flycatcher with a slight crest, a cinnamon back, dusky flight feathers, and buff underparts. Inhabits wooded caatinga (dry scrubby forest) in the breeding season, with migrants also found in Cerrado and Amazonian savannas and light woodland in the non-breeding season. The similar Rufous Casiornis has a rufous back, the same color as the wings.
Buff-bellied Tanager
Thlypopsis inornata
A small, odd, orange-headed bird with a restricted range in the Marañon drainage of northern Peru and far southern Ecuador. Small and warbler-like; combination of orange head, gray back, buffy underparts, and pale face is unique in its range. Female is duller than male, with less extensive orange on head. Similar to juvenile Rufous-chested Tanager, but has a pale face and lacks a well-defined white patch on the belly. Typically found in pairs or small groups that feed in the canopy of dry and semi-humid forest.
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