Akun Eagle-Owl
Ketupa leucosticta
A small insectivorous eagle-owl that sallies to catch flying insects from mid-canopy perches near openings in lowland forest. Has a distinctive pale belly with large dark spots, a brownish-gray face and back, yellow eyes, and a banded tail. Vocalizations include soft grunts, a short ascending or descending whistled “woooh,” and short trilled calls. Vocalizations can resemble those of other eagle-owls within its range, but Akun Eagle-Owl’s distinctive pale belly and large, obvious spotting on a mostly white chest are unique.
识别特征
The akun eagle-owl is one of the smaller eagle-owls, it has predominantly hark to reddish-brown head and upperparts, with pale, dusky brown bars on the wings and back, and white markings around the shoulders. There are two large "ear" tufts on the head which are dark brown with white spots, while the eyes are pale yellow. The upper breast is light reddish-brown and marked with dark bars, while the lower breast, belly and vent are white, with reddish-brown vermiculations and large blackish spots. Juveniles have a whitish head and body, with reddish-brown barring and brown wings and tail. The usual call is a low, accelerating, clucking rattle and when alarmed it produces an unusual quacking sound.
分类信息
The akun eagle-owl was formally described in 1855 by the German ornithologist Gustav Hartlaub from a specimen collected in Ghana. Hartlaub placed the owl in the genus Bubo and coined the binomial name Buco leucostictus. The specific epithet leucostictus is from Ancient Greek leukostiktos which means "white-speckled". The akun eagle-owl is now placed in the genus Ketupa that was introduced in 1831 by the French naturalist René Lesson. The species is monotypic: no subspecies are recognised. The common English name, akun, is from the local name for the owl in southwest Camaroon. The local name "Akuñ" was recorded by the collector George Latimer Bates near Grand Batanga and published in 1904 by the English ornithologist Richard Bowdler Sharpe.
- 学名
- Ketupa leucosticta
- 命名信息
- (Hartlaub, 1855)
- 目
- Strigiformes
- 科
- Strigidae
- 属
- Ketupa
分布与栖息地
The akun eagle-owl has a patchy range that extends through a number of the west African countries which have coastlines on the Gulf of Guinea, from Guinea east to Cameroon and south to Angola, extending inland into the southern Central African Republic, Congo and northern parts of the Democratic Republic of Congo.<p>The Akun eagle-owl is found mainly in lowland primary and secondary rainforest, particularly around forest edges and clearings, and also along the edges of rivers and on forested river islands.
- 迁徙
- Resident species
行为
Like most owls the akun eagle-owl is a nocturnal species emerging from its daytime roost at dusk to hunt. It's unusual for an eagle owl in that it apparently feeds almost exclusively on insects, its small feet and a relatively weak bill prevent it from tackling larger prey. Its main prey are beetles, cicadas and locusts, which are either gleaned from foliage or taken in flight before being brought back to a perch, held in the feet and ripped into small pieces with the bill. Little is known regarding the breeding biology of the Akun eagle-owl. In west Africa it appears to lay eggs around the period from November to January, and young owlets have been recorded in the nest in Liberia between February and April. As in some other eagle-owls, the Akun eagle-owl builds its nest on the ground.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Serra do Mar Tyrant-Manakin
Neopelma chrysolophum
Rather nondescript manakin that may resemble a flycatcher. Mostly olive green, but notable features include a yellow crown and paler chin. Found at the edge of humid forest and in second growth often in areas with bamboo; avoids the forest interior. The song is series of sharp notes followed by longer ones “chip, chip, dree-zee-zee, zéw.”
Orange-banded Thrush
Geokichla peronii
An unmistakable thrush with a “tiger-striped” face pattern, a white throat, a broad orange chest band, orange flanks, a white belly, and extensive bold white wing markings. Juveniles show rusty wing spots, pale streaking, a black and buff breast band, and black flank spots. Forages singly or in pairs on the ground and in trees, in forests and wooded patches within lowlands and hills. Confined to the eastern Lesser Sundas. Gives a rich, musical song characteristic of thrushes, with sequences of fluty upslurred and downslurred whistled notes comprising repeated phrases mixed with softer, chuckling sounds and thin, high-pitched notes.
Eurasian Moorhen
Gallinula chloropus
Distinctive dark waterbird that resembles a cross between a duck and a chicken. Adults have a bright red bill with a yellow tip, while immatures have a duller bill and legs. Note big white oval patches under the tail, and white streaks along the flanks. Inhabits fresh and brackish marshes, on ponds, lakes, and along slow-moving watercourses with bordering vegetation. Smaller and more retiring than coot, and rarely far out on open water. Swims with jerky motion and walks with stealthy gait, the tail often slightly cocked; does not usually dive. Gives a variety of loud, somewhat frog-like calls.
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