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
Malagasy Palm Swift
Cypsiurus gracilis
A very slender gray-brown swift with a long, deeply forked tail that is often held closed, making it look needle-like and pointed. The erratic flight pattern, with frequent direction changes and rapid wingbeats on long, scythe-shaped wings, is distinctive. Less gregarious than other swifts; usually found in pairs or small flocks, and association with other swallows and swifts is usually only fleeting. Forages over a wide variety of habitats with palms, including savanna, coastal scrub, towns, villages, cultivated areas, forest edge, and clearings, from sea level up to 1100 meters of elevation, preferring lowlands. Nests and roosts in palms, especially Hyphaene, Bismarckia, and coconut palms. Gives a high-pitched, metallic “tre-tit-tit-tit-tit-tit-tit-tit” call, solitarily or in unison with others. Separated from other swifts by its longer and thinner tail. Further separated from the larger Madagascar Swift by its much weaker and more fluttering flight.
Blue-crowned Chlorophonia
Chlorophonia occipitalis
Small, chunky, emerald-green finch of humid evergreen forest in highlands and foothills. Usually in pairs or small groups feeding at fruiting trees and bushes, often in the canopy where easily overlooked. Note the bright yellow belly and stubby bill. Blue crown patch often difficult to see, given that birds are usually overhead. Note similar Green Shrike-Vireo, which occurs in some of the same areas.
Moustached Warbler
Acrocephalus melanopogon
Resembles Sedge Warbler, but larger with a thick and well-marked white eyebrow and throat; contrasting dark cap; rufous rump, nape, and sides; short wings; and dark legs (pale in Sedge). Found in dense reed beds, often with bulrush stands. Makes muffled "treck" calls recalling a stonechat. Scratchy, repetitive song is given from the upper half of a plant stalk; does not sing in flight.
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