Australian Owlet-nightjar
Aegotheles cristatus
Smallest Australian nocturnal bird, primarily gray-brown with large eyes, relatively long tail, and "whiskers" on the face. During the day, usually seen only if one is peering out of a roosting hollow. Small size and near lack of eyeshine make this species also difficult to locate at night; the call, a loud, brief "chew," is the best way to locate one.
分类信息
- 学名
- Aegotheles cristatus
- 命名信息
- (Shaw, 1790)
- 目
- Caprimulgiformes
- 科
- Aegothelidae
- 属
- Aegotheles
分布与栖息地
- 迁徙
- Resident species
行为
The Australian owlet-nightjar feeds at night by diving from perches and snatching insects from the air, ground or off trunks and branches, in the manner of a flycatcher. It may also feed on the wing. It feeds on most insects, particularly beetles, grasshoppers and ants. During the day they roost in hollows in trees, partly for protection from predators and partly to avoid being mobbed by other birds that mistake them for owls.<p>The Australian owlet-nightjar nests mainly in holes in trees (or in other holes and crevices), which is provisioned with leaves by both of the pair. It is thought that the frequent addition of eucalyptus leaves is because they act as a beneficial insecticide. Three or four eggs are laid, and incubated by the female for just under a month. Both the adults feed the chicks, which fledge after a month. The young birds are reported to stay close to the parents for several months after they fledge.<p>The species is itself prey to another nocturnal carnivore, Macroderma gigas, a larger microchiropteran known as the ghost bat.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Rufous-necked Snowfinch
Pyrgilauda ruficollis
Quite brightly-colored for a snowfinch. Pale sandy brown above and white below with an orange crescent on the back of the cheek. May be confused with Blanford’s Snowfinch, but look out for a pair of roughly equal-length black stripes on the face which form a right angle. Found on wide open steppe meadows, pastures, and near human settlements.
Yellow-capped Pygmy-Parrot
Micropsitta keiensis
A tiny parrot of lowland and foothill forest canopy in the south and west of New Guinea. Mostly green with yellow under the tail and a yellowish crown. NW birds have a red streak on the belly. Crawls actively on trunks, even upside down, like a nuthatch. May overlap with Red-breasted and Buff-faced but Yellow-capped lacks the blue crown and buff face. Call, a shrill, descending screech “kiiiiiii!”.
Nicobar Sparrowhawk
Tachyspiza butleri
Small raptor with short wings. Male is gray above with thin brown barring on the pale underparts, and a black tail tip. Female is browner overall. Similar to Shikra, but Nicobar Sparrowhawk is smaller and paler, and has no tail bands. Known to be shy; sticks to treetops in forested habitats. Limited range restricted to a few of the Nicobar Islands.
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