Gray Go-away-bird
Crinifer concolor
Unusual gray turaco with a long tail and towering crest. The flight is hesitant, and the tail flops up and down. Usually in small groups, which often perch up conspicuously on trees and bushes. The calls include a series of grumpy yelps, and the classic nasal “go-waaay” call. Similar in shape to other go-away-birds, but there is little overlap in range, and easily separated by the uniformly gray coloration.
识别特征
The sexes are similar. They measure 47–51 cm from bill tip to tail tip, and weigh some 200 to 300 g. They have an almost uniform smoky-grey plumage with long tails and (similar to mousebirds) a wispy, back-swept crest of some 6 to 7 cm in length. The crest can be raised almost vertically when excited. The strong, decurved beak is black and the gape and tongue strikingly pink. The plumage is darkest grey on the chin and throat, and palest around the eyes and on the belly. The breast plumage is washed slightly olive like that of its near relative, the bare-faced go-away-bird.
分类信息
The grey go-away-bird was formally described in 1833 by the Scottish zoologist Andrew Smith from specimens collected inland from Port Natal (now Durban) in South Africa. He coined the binomial name Corythaix concolor. The specific epithet concolor is Latin meaning "uniform", "similar in colour" or "plain". The grey go-away-bird is now placed in the genus Crinifer that was introduced by the Polish zoologist Feliks Paweł Jarocki in 1821.<p>Four subspecies are recognised:
- 学名
- Crinifer concolor
- 命名信息
- (Smith, A, 1833)
- 目
- Musophagiformes
- 科
- Musophagidae
- 属
- Crinifer
分布与栖息地
It is native to southern Angola, southern DRC, Zambia, southern Tanzania, Malawi, Mozambique, Namibia, Botswana, Zimbabwe, South Africa and Eswatini. It occupies any arid to moist, and relatively open savanna woodlands, especially where Acacia trees are present. They frequent the edges of miombo woodland, and occur commonly along water courses, dry riparian forest and in Acacia woodland on alluvium. It also occurs commonly on farms and in suburban gardens and parks. They require water, and disperse along tributaries of desert rivers when water flows. It is absent from areas that lack suitable fruiting trees, and seems to desert areas where woody plant encroachment occurs. They have no regular migrations, but wander about irregularly in search of food and water.
- 迁徙
- Resident species
行为
Though their flight is rather slow and laboured, they can cover long distances. Once in the open tree tops however, they can display the agility which is associated with the Musophagidae, as they run along tree limbs and jump from branch to branch. They can form groups and parties numbering even 20 to 30 that move about in search of fruit and insects near the tree tops.<p>Its diet is mainly fruit (such as wild figs and berries), flowers, buds, leaves, termites, and snails. Fruit are obtained from plants in the genera Ficus, Viscum, Loranthus, Diospyros, Lannea, Ziziphus, Salvadora and Flueggea, among others. They also feed on fruit of exotic invasives like seringa, and disperse their seeds.<p>The flimsy nest platform is built from fairly thin, and often thorny sticks. It has the appearance of a substantial dove's nest, and their almost round, white eggs can be seen from below. Usually three eggs are laid in a nest that is placed at the center of an isolated tree. The adults share all parental duties, and the chicks start clambering about before they are able to fly. The chicks are covered in dense brownish down, and are fed regurgitated food by the parents. The breeding season is July to August in Angola, April to November in Malawi, August to September in Zambia, Sept and December to April in Namibia, and all months in Zimbabwe and South Africa.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Japanese Night Heron
Gorsachius goisagi
A small brown heron with awkward-looking, hunched appearance. Occurs in dense, damp lowland and foothill forests next to bodies of water, where it hunts prey in dense cover. Paler crown and weaker crest than similar Malayan Night-Heron and lacks the white wingtips of that species. Shy and difficult to see; most readily observed during migration, when it sometimes visits more open habitats. Gives hooting calls at regular intervals, especially in early evening.
Yellow-breasted Racquet-tail
Prioniturus flavicans
A large green parrot with a thin pair of tail rackets, confined to North Sulawesi and satellite islands. Entirely green, except for distinct yellow wash on breast and collar. Males show a small red crown patch. Juveniles lack rackets. Found in pairs and groups in canopy of forests and edges in lowlands and foothills. Prominent yellow breast and large size of this species distinguish it from Golden-mantled Racquet-tail. If rackets are not seen, note the silvery-gray bill, unlike Blue-naped Parrot. Noisy, giving varied vocalizations. Song is a high-pitched “kut-ut-ut-kler-kler.” Also gives screeches, squeaking, piping, and ear-splitting “kraa” notes.
Spotted Crocias
Laniellus albonotatus
Long-tailed and thick-billed relative of the laughingthrushes, found only in foothill and lower montane forests on Java. Hops about in the upper levels of the forest, often in small single-species groups, as well as mixed flocks. When seen from below, note the bright white throat, black face, pale yellowish belly, and dark undertail with white-tipped feathers. If seen at a level angle, note rust-and-white striped back and sides. Fast, repetitive, up-and-down song is often given by multiple birds at once.
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