Mouse-colored Antshrike
Thamnophilus murinus
Medium-sized inconspicuous antbird of lowland rainforest. Note gray (male) and brown (female) plumage, large bill, and lack of strong pattern on wing coverts. Found inside forest, often in pairs; may follow mixed-species flocks but often encountered alone, foraging deliberately in the mid-story or lower. Heard far more often than seen; song is a distinctive, short series of complaining notes with a characteristic doubled note at the end. The song is slower and more inflected than the song of Plain-winged Antshrike.
识别特征
The mouse-colored antshrike is 13 to 14 cm (5.1 to 5.5 in) long and weighs 17 to 20 g (0.60 to 0.71 oz). Members of genus Thamnophilus are largish members of the antbird family; all have stout bills with a hook like those of true shrikes. This species exhibits significant sexual dimorphism. Adult males of the nominate subspecies have gray upperparts with a hidden white patch between their scapulars. Their wings are dark yellowish brown that is somewhat rufous in the eastern part of its range; their wing coverts are grayer with buffy white tips. Their tail is brownish black and gray with white feather tips. Their underparts are a paler gray than their upperparts, especially on their throat and belly, and the center of their belly often is white. Adult females have a dull rufous forehead and crown. Their upperparts are olive-brown. Their wings are brown, and like the males' more rufous in the east; their wing coverts and flight feathers have buffy white tips and edges. Their tail is warm brown with thin white tips on the outer feathers. Their underparts are pale gray with an olive tinge on the flanks and a yellowish brown tinge on the breast, sides, and crissum. Both sexes have a gray or brown iris. Males of subspecies T. cayennensis have somewhat more reddish brown wings than the nominate. Males of T. canipennis have gray wings and wing coverts with grayish white tips and edges; both sexes have a gray iris.
分类信息
The mouse-colored antshrike was described by the English ornithologists Philip Sclater and Osbert Salvin in 1868 and given its current binomial name Thamnophilus murinus. It and the plain-winged antshrike (T. schistaceus) are sister species.<p>The mouse-colored antshrike has three subspecies, the nominate T. m. murinus (Sclater, PL & Salvin, 1868), T. canipennis (Todd, 1927), and T. cayennensis (Todd, 1927).
- 学名
- Thamnophilus murinus
- 命名信息
- Sclater, PL & Salvin, 1868
- 目
- Passeriformes
- 科
- Thamnophilidae
- 属
- Thamnophilus
分布与栖息地
The nominate subspecies of the mouse-colored antshrike is found from east-central Colombia's Guainía and Vaupés departments east through southern Venezuela, Guyana, and Suriname and through Brazil north of the Amazon from the Negro River as far as northeastern Amazonas state. Subspecies T. cayennensis is found in French Guiana and in northeastern Brazil north of the Amazon in Amapá and Pará states. T. canipennis is found from southeastern Colombia's Amazonas Department south through most of eastern Ecuador into eastern Peru as far south as northwestern Madre de Dios Department and into extreme northern Bolivia. Its range also extends east into western Brazil to the Japurá River and beyond south of the Amazon to the Madeira River.<p>The mouse-colored antshrike primarily inhabits lowland terra firme and white-sand evergreen forest. It favors the forest understorey to mid-storey, usually in the forest interior but also at its edges. In elevation it is found below 400 m (1,300 ft) in Colombia, below 450 m (1,500 ft) in Ecuador, below 1,200 m (3,900 ft) in Peru, and below 1,300 m (4,300 ft) in Venezuela and Brazil.
- 迁徙
- Resident species
行为
Migration pattern: Resident species.
保护状况
Population trend: declining.
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
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Northern Saw-whet Owl
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Pint-sized owl of the U.S., Canada, and Mexico; found in northern forests and western mountains. Prefers areas with conifers and thick understory. Fairly common, but shy and difficult to see. Patterned with brown and white overall, with streaked white forehead and blotchy rusty-brown streaks below. No ear tufts. Migratory, but numbers of migrants fluctuate greatly from year to year. Named for its loud, repetitive whistles that sound like a saw being whetted (sharpened). Also gives a harsher, rising screech. Most similar to less common Boreal Owl. Saw-whet is smaller with streaks (not spots) on forehead and richer orange-brown streaks on underparts.
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