Blyth's Hornbill
Rhyticeros plicatus
A huge, spectacular hornbill of lowland and foothill forest. All black body and white tail. Blue skin on the pouch below the bill and around the eye. Male is much larger with a rufous head and chest, whereas the female has a black head. A large, ivory-colored bill with a rippled casque on top. Presence often betrayed by loud wingbeats overhead. Forages in the canopy for fruit and sometimes, small animal prey. Unmistakable. The only hornbill in its range. Voice, far-carrying, gruff barks, or grunts “gew! gew! gew!”.
识别特征
Up to 91 cm (36 in) in length, the adult male has mainly black plumage with a golden or orange-buff head, white throat and a white tail. Its irises are reddish brown, and the eye is surrounded by naked pale blue skin. The female is a smaller, mainly black bird with a white throat and tail. Both sexes have a very large horn-coloured bill and casque. Young birds of both sexes resemble the male. Adults have up to eight folds on the pale casque, depending on age, while young birds have none.<p>In flight the sound of its wings is loud and distinctive, a rushing noise that has been compared to the sound of steam escaping from a steam locomotive. It has a range of far-reaching, guttural grunting and laughing calls.
分类信息
- 学名
- Rhyticeros plicatus
- 命名信息
- (Pennant, 1781)
- 目
- Bucerotiformes
- 科
- Bucerotidae
- 属
- Rhyticeros
分布与栖息地
The Papuan hornbill occurs throughout lowland forests, from sea level up to 1,200–1,500 m ASL, in the Moluccas, New Guinea, the Bismarck Archipelago, and as far east as the Solomon Islands. It is the only hornbill species native to New Guinea, and one of the largest flying birds of the region. There have also been rare reported sightings on the Saibai and Boigu Islands in the Torres Strait, Queensland, Australia.<p>Its diet consists mainly of fruits, especially figs, occasionally supplemented with insects and other small animals.<p>The Papuan hornbill nests in a large tree hollow in the rainforest, from at least 18 m (59 ft) up to 30 m (98 ft) above the ground. The female is restricted to the nest cavity throughout the incubation and nestling period, being largely sealed inside by plastering up the entrance with a mixture of fruit pulp and rotten wood, leaving only a narrow aperture through which the male feeds her. The clutch size is about two eggs.<p>Still widespread throughout its large range, the Papuan hornbill is assessed as least concern on the IUCN Red List of Threatened Species. However, it is subject to hunting pressure by some tribal groups, who use its feathers in headdresses, its bill as a personal adornment, and the lower mandible as a spear point. As a consequence, it is becoming rarer in some areas of New Guinea. On the other hand, this species has withstood tens of millennia of human hunting pressure. So as long as sufficient habitat is preserved, it is unlikely that hunting alone will prove a significant threat unless population increases include concomitant increases in hunting pressures.
- 迁徙
- Resident species
保护状况
- 种群趋势
- declining
照片
分布
其他鸟类
Little Ringed Plover
Thinornis dubius
Delicately built small plover with bright yellow eyerings. Note dull pinkish legs and large white forehead patch (in adults). Plumage much like bulkier Ringed Plover, but white eyebrow continues unbroken across forehead. In flight shows narrow, indistinct whitish wing stripe. Breeds on stony substrates around lakes, gravel pits, and along rivers; migrants occur in wide variety of fresh and brackish wetland habitats, but rarely out on open tidal areas. Clipped “peu” call quite distinct from call of similar Common Ringed Plover.
Cheer Pheasant
Catreus wallichii
A large, pale pheasant with a long tail, an untidy crest, and red skin around the eye. The male is pale gray, barred throughout, with thick black bands on the tail, a rust-colored lower back, and a dark belly. The female is browner with white streaks on the body, white bars on the tail, a rust-colored belly, and black spots on the breast. Shy, often found in small groups along steep, grassy hillsides in the Himalayas. Quite noisy, usually delivering a series of thin and scratchy notes.
Philippine Spinetail
Mearnsia picina
A little-known medium-sized, short-tailed swift found over forest, usually at higher elevations. Mainly black with obvious white throat and underwing patches. Wing shape is unusual, with a “cut-out” next to the body and pointed wing tips curved backward. Tail square, with spines that are difficult to see. Distinguished from other swifts in its range by the white marks under the wings. Voice unknown.
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