Dark Batis
Batis crypta
Males have the typical batis pattern of black, white, and gray. Females have a more unusual pattern, with rufous in the wing, rufous on the throat, and a variable amount of rufous on the breast. Both sexes have orange or reddish eyes. Found at middle levels and in the canopy of forest at low and middle elevations, often in pairs. Very similar to Short-tailed Batis, but there is no known overlap in range. Males are similar to Chinspot and Pale Batises, but are distinguished by the darker eye and shorter tail. Females are distinctive. The song is variable, but is usually a long, slow series of identical low-pitched tooting notes, sometimes given along with raspy “chugaree” calls.
识别特征
The dark batis is about 10 cm (3.9 in) in length and weighs 10–15 g (0.35–0.53 oz). It has a dark bill and legs and red eyes. The male is white below with a broad black breastband. Above it has a dark grey crown, grey back with some black feather-tips, a black face-mask and black wings with a white stripe. The female has a greyish crown, brownish back, dark mask, slight white supercilium and a narrow rufous stripe on the wing. Below it has a rufous chin-spot and breast with whitish tips to some of the feathers.<p>The forest batis has a slightly shorter tail. Males of the two species are very similar but forest batises have a narrower breastband and usually some hint of a white supercilium which is lacking in the male dark batis. The females are more distinctive: female forest batises have a paler breast and chin with more white tips giving a mottled appearance. There is a conspicuous white supercilium and a broad rufous wing-stripe.<p>The dark batis has a variety of whistling and harsh churring calls and its wings make a whirring sound in flight. The male's song is a series of short, low whistles.
分类信息
Genus: Batis; Family: Platysteiridae; Order: Passeriformes.
- 学名
- Batis crypta
- 命名信息
- Fjeldså, Bowie & Kiure, 2006
- 目
- Passeriformes
- 科
- Platysteiridae
- 属
- Batis
分布与栖息地
It is found in the Eastern Arc Mountains of East Africa from the Ukaguru Mountains and Uluguru Mountains of central Tanzania south-westwards as far as the Misuku Hills in northernmost Malawi and the Njesi Highlands in northern Mozambique.<p>It inhabits evergreen forest from 540 to 2,140 metres (1,770 to 7,020 ft) above sea-level and is most common around 1,500 metres (4,900 ft). It forages mainly in the lower and middle levels of trees, feeding on insects such as termites.
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: stable.
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Rufous Mourner
Rhytipterna holerythra
Overall rusty-colored, medium-sized flycatcher of humid tropical forest in the lowlands. Favors middle to upper levels inside forest, where sits still for long periods and sallies out for insects and other small critters. Call is a distinctive slow wolf-whistle—“whee-wheeu,” given at infrequent intervals and easily imitated. Note the overall rusty plumage, slender bill, and behavior. Can be confused with slightly larger Rufous Piha, which has a bushier face, paler throat, and a very different voice.
Guadalcanal Crow
Corvus woodfordi
A medium-sized crow with a rather short tail and a massive pale dark-tipped bill. Found in lowland and montane rainforest up to 1250 meters of elevation. Voice typically consists of staccato cawing and rasping.
Barrow's Goldeneye
Bucephala islandica
Striking diving duck of coastal harbors, mountain lakes, and large rivers. Very similar to Common Goldeneye. Males are easiest: Barrow’s has more black on the back, a downward-pointing spur on the side, and a crescent-shaped (not circular) white patch on the face. Females can be very difficult. Barrow’s usually has a yellow bill, but Common can rarely show a dull yellowish bill. Head and bill shape are important: Barrow’s has a steeper forehead and a puffy nape, and a shorter bill with a more rounded lower edge. Fairly common in western U.S. and Canada; much less common in the northeast. Small population in Iceland. Frequently found in mixed flocks with Common Goldeneye.
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