Australian Swiftlet
Aerodramus terraereginae
Small plain grayish swiftlet with a pale rump and a slightly darker cap. Almost always seen in flight; note slender wings, very quick stiff wing beats. Possible confusion with Tree Martin, which is much paler below with a paler rump, plumper body, and shorter wings. Abundant in tropical north Queensland.
识别特征
It is 11–12 centimetres (4.3–4.7 in) long with a wing length of 107–118.2 millimetres (4.21–4.65 in) and a weight of 10.5–12.5 grams (0.37–0.44 oz). The upperparts are dark grey-brown while the underparts are a uniform greyish. There are pale feathers on the forehead and lores. The rump is normally pale greyish but can occasionally be darker. The tail is slightly forked. The form chillagoensis is smaller and paler with a weight of around 9.39 grams (0.33 oz).<p>It has a high-pitched flight call. In its breeding caves, it utters a metallic clicking call, used for echolocation.
分类信息
- 学名
- Aerodramus terraereginae
- 命名信息
- (Ramsay, EP, 1875)
- 目
- Apodiformes
- 科
- Apodidae
- 属
- Aerodramus
分布与栖息地
A. t. terraereginae occurs in tropical north-east Queensland from the Claudie River on the Cape York Peninsula south as far as the Eungella Range near Mackay. It is mainly found near the coast including a number of offshore islands. It occurs up to 1,000 metres (3,300 ft) above sea-level but is commonest below 500 metres (1,600 ft). A. t. chillagoensis is found further inland in the area around Chillagoe, west of the Great Dividing Range.
- 迁徙
- Resident species
行为
Breeding occurs from July to March. The species breeds in colonies which can contain hundreds of individuals. These are located in caves or sometimes amongst boulders. The nest is attached to the walls or ceiling of the cave, 2–20 metres (6 ft 7 in – 65 ft 7 in) above the ground. It is translucent and basket-shaped and made from saliva mixed with grasses, casuarina needles, twigs and feathers. Two clutches are laid during the breeding season, each consisting of a single white egg. The egg is incubated by both parents for about 26.5 days. Incubation of the second egg is aided by warmth from the first chick. The young bird remains in the nest for about 46–51 days after hatching.<p>The Australian swiftlet feeds in flight, preying on insects and drifting spiders. It forages in flocks over rainforest edges, savanna, pastures, beaches and gorges. It generally feeds within 30 kilometres (19 mi) of the breeding colony, leaving the nest for periods of about 30 minutes to hunt.
保护状况
- 种群趋势
- stable
照片
分布
其他鸟类
Spix's Guan
Penelope jacquacu
Large, stocky brown bird. Largely arboreal, but often seems too large or clumsy for its tree-dwelling habits. Calls loudly when flushing from a tree and makes crashing noises as it lands roughly in another tree. Found around forest edges and young forest as well as in more mature forests. Typically found singly or in pairs, occasionally in larger groups. Larger and darker than chachalacas with more prominent red skin on throat.
Qilian Bluetail
Tarsiger albocoeruleus
A newly described species endemic (at least as a breeder) to a few pockets of northern China. Essentially visually identical to Red-flanked Bluetail: adult male is sky-blue above and pale below, with orange sides and a small white eyebrow. Female and juvenile are more subdued, but still have the rufous flanks and blue tail. Breeds in humid montane forest, often favoring mossy, damp areas. Wintering range and habits essentially unknown, but probably overlap those of Red-flanked Bluetail. Can be hyperactive, moving quickly across the forest floor, stopping to flick the tail downwards. Best identified by range and distinctive song: a short, descending sweet yet burry phrase repeated regularly, very different from the song of Red-flanked Bluetail. Also has a variety of calls that are less distinctive, including a rising “sweet”, a descending “seet”, and a series of low, dry notes.
Greater Bird-of-Paradise
Paradisaea apoda
A large bird of lowland and foothill forest and edge. Male has a black breast and white and yellow plumes which he raises above his back during his display, in which he variably hops about and flaps his wings, then holds them out still. May overlap slightly with Lesser and Emperor birds-of-paradise but male Greater is larger and lacks a yellow back. Female Greater is distinguished from other species by its all brown body. Male gives a typical, repeated nasal squawk.
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