Yellow Longbill
Macrosphenus flavicans
An unusual warbler with a long bill and yellow eyes. Brownish above and dull yellow below with a gray head and whitish throat. Found in rainforest, mainly in dense tangles at middle levels, usually in pairs or small groups. Similar in appearance to other longbills, but with a good view, separated by the coloration of the underparts. Most often detected by the distinctive song: a long series of clear whistled notes in which each note is slightly lower in pitch. The pattern is similar to that of Sabine’s Puffback, and the individual notes sound very batis-like.
识别特征
The yellow longbill, on average, measures 13 cm from bill to tail and weighs 11-16g. It is medium in size. It has a short tail and a black long straight bill with a small hook at the tip. It has a yellow iris and greenish-yellow underparts. It is dark olive-gray at the top of its head. Its feathers transition to dark olive-green on the upperparts and upper wing and become yellow-tinged on long loose feathers on the back and rump. Sexes are alike in plumage, male being larger than female. The yellow longbill has a span of life of 3.6 years. The current population trend of the yellow longbill is stable. The number of mature individuals is unknown, as is the continuing decline of mature individuals.
分类信息
- 学名
- Macrosphenus flavicans
- 命名信息
- Cassin, 1859
- 目
- Passeriformes
- 科
- Macrosphenidae
- 属
- Macrosphenus
分布与栖息地
The yellow longbill's habitat is in the forest, more specifically the subtropical and tropical moist lowland. Lowland habitats are of the lower and middle levels, including the primary and secondary forest. These forest habitat lowlands involve edges, clearings and logged areas. Lowlands range to levels of 1000-1400m in Uganda and to 1800m in the eastern Democratic Republic of Congo. The geographic range for the yellow longbill includes Angola, Cameroon, Central African Republic, the Democratic Republic of the Congo, Equatorial Guinea, Gabon, Nigeria, South Sudan, Sudan, United Republic of Tanzania, and Uganda. Specific distributions for subspecies have been identified. The Macrosphenus flavicans flavicans subspecies is distributed throughout extreme southeast Nigeria, Bioko, and southwest and south Cameroon south to lower River Congo and northwest Angola. The Macrosphenus flavicans hypochondriacus subspecies is distributed throughout southeast Central African Republic, southwest South Sudan (Bengangai Forest), north, central, and east Democratic Republic of the Congo, west and south Uganda and northwest Tanzania (Minziro Forest).
- 迁徙
- Resident species
保护状况
The conservation status of the yellow longbill is classified as of least concern. This classification was assessed on October 1, 2016. They are not globally threatened. They are common in many areas of their range. Two discrete populations of the yellow longbill exist in forests of West and Central Africa. There are few conservation actions in place for the yellow longbill. There are no in-place research and monitoring actions. There are land and water identified conservation sites in place. There are no species management or education conservation actions in place.
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Bronze-winged Jacana
Metopidius indicus
Gangly inhabitant of well-vegetated wetlands, especially ponds and lakes with floating vegetation. Adult’s dark neck and bright white eyebrows are unmistakable. Juvenile’s white cheek and orangish neck can lead to confusion with Pheasant-tailed Jacana; look for Bronze-winged’s wholly brown wings.
Sooty Shearwater
Ardenna grisea
Medium-sized, dark brown shearwater with silvery flashes on underwings. Narrow wings with quick, deep wingbeats. Widespread and common, especially in the Pacific; can sometimes be seen close to shore. Can be in massive flocks. Extremely similar to Short-tailed Shearwater, but Sooty is heavier and has straighter wings; also look for slightly longer bill and less rounded head. Brown plumage is reminiscent of Flesh-footed Shearwater, but Sooty is narrower-winged and has a smaller, all-dark bill.
Sooty Owl
Tyto tenebricosa
Medium-sized dark-gray owl with prominent facial disc and white speckles through the plumage. This handsome species inhabits rainforest, wet eucalypt forest, and surrounding habitats. Its pale feet seem too large for its body. The northern subspecies is smaller and paler. Main calls include a high-pitched "falling-bomb" whistle and insect-like squeaks and trills.
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