Seychelles Kestrel
Falco araeus
Unusually small kestrel with a gray head, a rufous back, unmarked buff underparts, a barred tail, and a dark “moustache” mark on the face. Found on several of the granitic Seychelles Islands. Originally found in areas of rainforest with cliffs and other rocky areas; now found in secondary scrub, cultivated areas, plantations, and towns, as well as in remnant natural habitat. Unlike other kestrels, does not hover. Call is a high, repeated “krii.” Shares general falcon shape with migrant and vagrant falcons, including Eleanora’s and Sooty Falcons, but smaller, with shorter, less pointed wings.
识别特征
It is the smallest of the kestrels, 18–23 cm long with a wingspan of 40–45 cm. The wings are fairly short and rounded. The adult male's upperparts are reddish brown with black spots while the underparts are unspotted and buff. The head and rump are dark blue-grey. The tail is blue-grey with black bars. The bill is dark and the feet and cere are yellow. Females are similar to the males in appearance but are a little larger and paler. Immature birds have a brown, streaked head, spots on the breast and a buff tip to the tail.
分类信息
- 学名
- Falco araeus
- 命名信息
- (Oberholser, 1917)
- 目
- Falconiformes
- 科
- Falconidae
- 属
- Falco
分布与栖息地
- 迁徙
- Resident species
行为
It can be seen in forest, scrub and farmland and around rock faces and houses. It rarely hovers, instead feeding by sitting on an exposed perch and waiting for prey to pass, then swooping down to catch it. Lizards, particularly green day geckos (Phelsuma) and skinks (Mabuya), make up 92% of its diet and it will also take small birds, frogs, rats and insects.<p>The breeding territory covers just 40 hectares, the smallest of any bird of prey. Breeding occurs from August to October. The nest site is on a cliff, tree or building. It is a simple scrape with no nest material used. Two or three eggs are laid; they are white with brown markings and are incubated for 28–31 days. The young birds fledge after 35–42 days and then remain with their parents for another 14 weeks.
保护状况
The species has a population of about 800 birds and is classified as vulnerable. Lowland nests have a high failure rate of about 70-80%. It probably bred throughout the granitic central Seychelles in the past but is currently known to breed only on Mahé, Silhouette, North Island, Praslin and some small adjacent islands. It was reintroduced to Praslin in 1977.<p>Threats are thought to include habitat loss due to logging, housing development and fires as well as predation and competition by introduced species. Rats, cats and barn owls have reduced the lizard population on which the kestrels depend and they may take eggs and chicks. Barn owls and common mynas have occupied many suitable nest sites.<p>Persecution by humans is now rare. In the past, kestrels were killed because they were thought to take chickens and because they were considered to be an omen of death.
- 种群趋势
- stable
照片
分布
其他鸟类
White-browed Shama
Copsychus luzoniensis
A medium-sized, long-tailed bird of lowland and foothill forest. Male has a black head, upperparts and chest, a single white wingbar, a white belly, pale orange sides, and white outer tail feathers. The female has a gray chest and face with a brown cheek, crown, back, and wings. Somewhat similar to Philippine Magpie-Robin, but White-browed Shama has a long white eyebrow and a rufous rump. Heard more often than seen. Song is a pleasant and varied whistled melody, often finishing in a low, descending warbling trill.
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Hirundo albigularis
A swallow with a small rufous patch on the forehead and a diagnostic complete steel-blue breast band which forms a white throat patch. This migrant breeds in South Africa in the Austral summer, September to April, and spends the non-breeding period (May to August) in south-central Africa. It prefers foraging in pairs or groups, sometimes with other swallow species, in grassland, light woodland, and floodplains, and is often seen perching on fences or on posts near water.
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