Pallid Swift
Apus pallidus
Medium-sized swift, dark overall with a white throat patch. Like Common Swift, nests in buildings and cliff faces, often in coastal regions, and forages over a wide range of habitats. Very similar to Common Swift but with slightly paler plumage overall (plumage tones of both species greatly influenced by lighting), subtly blunter wings, and less deeply forked tail. Shrill screaming call is subtly different from that of Common Swift as well: slightly deeper, and sometimes incorporating a slight “hiccup” at the end. Many dark swifts are not safely identified in the field.
识别特征
This 16–17 cm (6.3–6.7 in) long species is very similar to the common swift, and separation is only possible with good views. Like its relative, it has a short forked tail and very long swept-back wings that resemble a crescent or a boomerang.<p>It is entirely dark except for a large white throat patch which is frequently visible from a distance. It is chunkier and browner than common swift, and the slightly paler flight feathers, underparts and rump give more contrast than that species. It also has a scalier looking belly and subtly different flight action. The call is a loud dry scream similar to that of its relative, though possibly more disyllabic.
分类信息
The pallid swift was first described by English naturalist George Ernest Shelley in 1870.
- 学名
- Apus pallidus
- 命名信息
- (Shelley, 1870)
- 目
- Apodiformes
- 科
- Apodidae
- 属
- Apus
分布与栖息地
Pallid swifts breed on cliffs and eaves around the Mediterranean and on the Canary Islands and Madeira, laying two eggs.<p>They are rare north of their breeding areas, although they are likely to be under-recorded due to identification problems. Because of its more southerly range, pallid swift arrives earlier and leaves later than the closely related common swift, so particularly early or late swifts north of the normal range should be carefully observed.<p>Like swallows, they are migratory, wintering in southern Africa or southeast Asia.<p>Pallid swifts that breed in Gibraltar have been tracked using GPS technology, and has shown them to have multiple African wintering grounds south of the Sahara at specific times of the year. One bird, tracked over two consecutive winters, showed remarkable fidelity to the areas visited in Africa between years. The study also supports previous findings of an airborne existence in swifts outside the breeding season, with two pallid swifts giving no indication of coming to land.
- 繁殖区
- PAL, AF : s Europe, Arabian Pen. and n AF
- 非繁殖区
- c, w AF
- 迁徙
- Complete migrants
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类

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Stephanoaetus coronatus
A large, boldly-marked, crested eagle with a long tail and broad wings, resembling a massive goshawk. The underparts of the adult are blotched and barred black-and-white; there is also a variable rufous wash across the breast. The pale immature has creamy-tan underwings. It is resident in thicker woodland and lowland, montane, and riverine forest, where it hunts monkeys and other small-to-medium-sized vertebrates. It has an undulating display flight coupled with a loud “wheee-yooo, wheee-yooo, wheee-yooo” call that often draws attention. Juvenile Crowned and Martial eagles are similar, but the Crowned has buffier underparts (and underwings), spotted flanks, and broader bars on the tail.

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Sahul Cicadabird
Edolisoma tenuirostre
Woodland bird of eastern and northern Australia and New Guinea. Strong sexual dimorphism in plumage. Male dark slaty-gray, with black around bill, and black on wings. Female brown, with dark line through eye, extensive fine barring on chest and belly, and fairly plain brown wings (much browner and lacking the white wingbars of Varied Triller). Shows geographical variation, especially in female plumage. Found in the canopy of a wide variety of forest, woodland, scrub, and savanna habitats. Calls include a long (10-second) sequence of insect-like repeated buzzes (hence its name), also a slower version, and a robin-like sequence of clear whistled notes.
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