Cape Crow
Corvus capensis
All-black crow with an unusually slender bill. Found in a wide variety of open country habitats, including desert, dry savanna, montane grassland, and cultivation. Usually in pairs or small flocks; feeds by walking along the ground. Common call is a typical of crows: a gruff caw. Also gives variable rasping and bubbling vocalizations. The slim bill separates it from all other crows in its range. Lacks the gray neck and breast of House Crow.
分类信息
- 学名
- Corvus capensis
- 命名信息
- Lichtenstein, MHC, 1823
- 目
- Passeriformes
- 科
- Corvidae
- 属
- Corvus
分布与栖息地
This species occurs in two large separate regions of the African continent. One form ranges from the Cape at the southern tip of Africa north to southern Angola and across to the east coast of Mozambique. The other population occurs in a large area from South Sudan, Ethiopia, Tanzania, and Kenya in central East Africa. The more northern population is on average slightly smaller than the southern. It inhabits open grassland, moorland, and agricultural areas with some trees or woodland in the vicinity for nesting. It seems to thrive especially in agricultural areas.
- 迁徙
- Resident species
行为
It eats grain and other seeds, and invertebrates, which it digs for with powerful downward stabs of its long bill. It opens maize kernels before they are fully ripe, bulbs and fleshy roots of certain plants, frogs and small reptiles, and fruits and berries. It takes the eggs and chicks of ground-nesting birds and has been known to kill birds up to a pound in weight (especially domestic poultry). It turns over the droppings of herbivorous mammals for insects.<p>Nesting is almost always in trees, usually near the top, but has been known to nest in shrubs infrequently. Usually, three or four eggs are incubated about 18–19 days and hatchlings are fledged by around 38 days. Typically, only three nestlings survive.<p>The voice is described as a krrah.....krrah.....krrah or a quicker kah-kah-kah. It also makes very loud, liquid bubbling sounds that carry quite a distance; it also gives throaty chuckles. Some evidence indicates that vocal mimicry is practised, too.
保护状况
- 种群趋势
- rising
照片
分布
鸟叫声
其他鸟类
Bush Thick-knee
Burhinus grallarius
Distinctive large shorebird with long legs, enormous yellow eye, heavily streaked underparts. During the day stands or sits under small trees/shrubs, often in small groups. When disturbed will lie down and flatten neck to the ground. At night becomes active and wanders around calling its wonderful eerie wailing cry. In cities like Darwin, Cairns, Brisbane it is relatively common in parks, open grounds, camping grounds. More common across northern Australia.
Streak-crowned Antvireo
Dysithamnus striaticeps
This plump little forest bird has a large head and short tail. Not striking, but distinctive in limited range. Male grayer, female browner. Look for small white spots on wing and faint streaks on throat and chest. Both sexes have streaked crown, although male is gray and female is rufous. Often seen following a mixed-species flock; sticks to the lower levels in the forest.
Black-crowned Sparrow-Lark
Eremopterix nigriceps
Small, finchlike lark of arid zones with strong sexual dimorphism. Male is striking with black underparts, whitish cheeks, and black crown. Female is overall gray-brown overall and lightly-streaked; best identified by short, heavy bill. In flight shows dark underwing coverts and black tail (from above black tail sides). Breeds on desert plains with scattered bushes. Song is a repetitive short phrase of clear, high-pitched whistles. Call is a short, buzzing "Zzz" or "Zik, zik…"
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