Dwarf Fruit-Dove
Ptilinopus nainus
A tiny fruit dove of lowland and foothill rainforest. Mainly green with bright yellow vent. Male has a distinctive purple mark across the chest and a pale crescent above the shoulder. Often found in pairs and sometimes mixing with other fruit-dove species. Feeds on fruit and also nectar. Similar to female Claret-breasted and White-breasted Fruit-Doves, but Dwarf Fruit-Dove is smaller and has yellow edging to the wing feathers. Call, a distinctive falling and rising, “oh-wah!” repeated several times.
识别特征
With a total length of 13–15 cm (5.1–5.9 in), it is the shortest pigeon or dove in the world, but as it is thickset, several other species weigh less. Its plumage is overall green, but with contrasting yellow undertail coverts, and narrow bars to the wings. The inner wing-coverts and secondaries are more bluish in color compared to the rest of the body. This bluish-green coloring is most prominent on the scapulars, which are the body feathers that cover the top of the wing when the bird is at rest. The males differ in color and plumage from the female. The males have a dark purple patch on the belly and tend to have a gray patch on both sides of their upper breasts. Both males and females have a yellowish-green beak and purplish-red legs, in addition to a yellow area on their abdomen and undertail coverts. Juvenile fruit doves resemble the coloring of females, but have yellow fringes on most of their plumage. Eventually this yellow fringe will disappear, and the birds will resemble their gender colorings. These fruit doves will often be found in pairs of their own species, and sometimes intermingling with other fruit dove species.<p>Dwarf fruit doves will communicate with each other using a high-pitched, slow, soft, and prolonged up slur. With a one-second pause, the sound is repeated about six times. Their call resembles a “oh-wah” sound.
分类信息
- 学名
- Ptilinopus nainus
- 命名信息
- (Temminck, 1835)
- 目
- Columbiformes
- 科
- Columbidae
- 属
- Ptilinopus
分布与栖息地
The habitat of the dwarf fruit dove is forests in the lowlands and foothills of New Guinea, excluding northwestern New Guinea and the north coast of southeastern New Guinea. Additionally, they are found in the Raja Ampat islands off the coast of Northwestern New Guinea. They have been most found in hills up to 1100 meters. They can also be found at Varirata National Park in New Guinea.
- 迁徙
- Nomadic movement
行为
The dwarf fruit dove's nests have been found in September and November. Nests are found at varying heights in small trees from 3 meters above ground to 12 meters above ground. These nests are built by the female bird using twigs and dead leaves collected by the male.<p>90 percent of their diet comes from fruit, whereas the other 10 percent comes from nectar. The dwarf fruit dove can be considered a frugivore and nectarivore.
保护状况
- 种群趋势
- stable
照片
分布
其他鸟类
Beach Kingfisher
Todiramphus saurophagus
A large coastal kingfisher with a gleaming white head, a thin black line behind the eye, and a blue-green back. Juvenile duller, with buff on crown and underside. Found singly or in pairs in mangroves, on beaches, and along rocky shorelines, where it often perches on exposed rocks or in trees bordering coast. Clean white crown and narrow (not wide) black strip behind eye distinguish it from all forms of the smaller Collared Kingfisher. Vocal, giving harsh calls: a “choo-chew” descending on the second note and a rapid, agitated “kip-kip-kip-kip-kip.”
Black-backed Puffback
Dryoscopus cubla
A small, canopy-loving black-and-white shrike with a fiery red eye. When excited, males can raise fluffy white feathers on the rump to resemble a puffball. The sexes differ, with males clean-cut and females duller and more cream-and-gray in coloration. Singles and pairs frequently join mixed-species flocks foraging agilely for insects, working the canopy of dense broadleaf woodland and riverine, lowland, and montane forest. Black-backed Puffbacks are often detected by their characteristic song: a loud click followed by a whistled wheeeoo,” the combination given repeatedly.
Northern Fulmar
Fulmarus glacialis
Stocky, medium-sized seabird like a mix between a shearwater and a gull. Variable plumage. Light morph birds are white below and gray above like a gull. Dark morphs are generally sooty-gray overall, darker and browner in the Pacific. All but the darkest birds have a pale patch on the upperwing. Also note thick pale bill with orange tip. Flies with stiff wingbeats, often wheeling and arcing like a shearwater. Can be seen singly or in flocks, often loosely associating with other seabirds when feeding. Breeds on cliffs at high latitudes across the Northern Hemisphere; otherwise found offshore in cold water. Rarely seen from land except at colonies. Atlantic and Pacific populations may be separate species.
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