Boulton's Batis
Batis margaritae
A cute, dumpy flycatcher-like bird with a black chest band and white throat. Sexes differ: male has a golden eye and white wing-bar; distinctive female has a reddish-brown eye and chestnut wing bar. Pairs hunt for insects, sometimes joining flocks, in montane, riverine and dry forest, and dense thickets. Male Chinspot Batis looks almost identical to male Boulton’s, but Chinspot prefers savanna habitat and calls differently. Calls a hollow melodious “wooooe” whistle once a second, and repeated 10–20 times, as well as typical batis churring and croaking.
识别特征
Margaret's batis is a small, mainly black and white shrike-like bird with a black face mask and reddish eye, in a mainly dark grey head. They have white underparts with a broad black breast band in both sexes, with black wings which are marked in the male with a white wing stripe while the female has a rufous wing stripe. The tail is black with white outer tail feathers. Juveniles resemble the females but are duller and have brown eye. The bill and legs are black. They measure 11–12 cm (4.3–4.7 in) in length and weigh 11.5–15.5 g (0.41–0.55 oz).<p>Margaret's batis is known to make various whistles and churring calls. The territorial call is a repeated, soft, thin "hoo-hoo-hoo-hooit-hooit-hooit" which varies in length. The female and male duet with a tweeting call.
分类信息
Margaret's batis was described by the American zoologist Wolfrid Rudyerd Boulton in 1934. The binomial and common names honour the American historian and novelist Margaret Leech (1893-1974).<p>Two subspecies are recognised:
- 学名
- Batis margaritae
- 命名信息
- Boulton, 1934
- 目
- Passeriformes
- 科
- Platysteiridae
- 属
- Batis
分布与栖息地
Margaret's batis occurs mostly in forests dominated by Cryptosepalum spp but also occurs in other types of dry evergreen forest, riverine forest and secondary scrub growth. It is usually found in pairs and it is thought that its social behaviour is similar to that of other batises. It forages in trees and is not as restless as many of its congeners when foraging, often staying still for up to a minute. It joins mixed foraging flocks, often in the company of chinspot batises. In Zambia there appear to be local movements out of Cryptosepalum forest during the November to April rainy season.
- 迁徙
- Resident species
行为
The breeding biology of Margaret's batis is little known. A nest was observed on Mount Moco, Angola, in 2010 when a single nest containing two eggs was found in the fork of a 1 m (3 ft 3 in) tall sapling in an area of dense undergrowth at an altitude of 2,390 m (7,840 ft) was attended by a pair of Margaret's batis. The nest was placed at a height of around 90 cm (35 in) from the ground, The inside of the nest cup was lined with very thin strips of grass, while the outside consisted of fine grass and mosses bound with spider's web, with small pieces of lichen attached to the spiders webs. The construction and dimensions of the nest are very similar to those of other batises.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
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Hirundo tahitica
Handsome swallow endemic to Tahiti and Moorea. Adult is iridescent blue above and smoky gray below, with an orangish throat and forehead. Could potentially be confused with Tahiti Swiftlet, but note brighter coloration and different body structure. Occasionally seen close to coastal cities, but more frequently encountered in “wilder” native forest habitats. Sometimes perches on telephone lines.
Orange-browed Hemispingus
Kleinothraupis calophrys
Greenish and golden tanager of low, dense understory and midstory of humid montane forest just below treeline in the central and Northern Bolivian Andes, including adjacent extreme SE Peru. Distinguished from other hemispinguses by rich orange-gold supercilium and throat. Travels in pairs in mixed species flocks, generally within two meters of the ground. Song a very high, long, uneven twittering,
Chestnut-capped Babbler
Timalia pileata
Distinctive brown babbler with a small black mask, white throat, and rusty orange cap. Color scheme loosely similar to that of Streak-breasted Scimitar-Babbler, but has a proportionally longer and broader tail, no solid streaking on the breast, and a short, dark, uncurved bill. Inhabits reedbeds, tall grass, scrub, and weedy edges. Listen for its chattering and metallic call notes as flocks move around noisily in cover. Song is variable, but is usually some variant of a chittering whinny.
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