Aripuana Antwren
Herpsilochmus stotzi
Recently described Amazonian antwren. Males are gray with a bold white eyebrow and a black crown, wings, and tail. Females have a pale rusty forehead patch. Occurs primarily in white sand forest, but also in humid forest, where it forages in the canopy, often with mixed-species flocks. The song is a rolling trill. The similar Predicted Antwren has a longer song; males have more black on the back and females have a more rusty forehead.
识别特征
The Aripuana antwren is 11 to 12 cm (4.3 to 4.7 in) long and weighs about 11 g (0.39 oz). Adult males have a black crown and nape, a long whitish supercilium, and a black streak through the eye. The rest of their upperparts are gray. Their wings are black with white tips on the coverts and white edges on the flight feathers. Their tail is black with large white feather tips and white edges on the outermost. Their throat is pale creamy white and their breast and belly whitish. Adult females have an orangish forehead and a black crown with white streaks. Their upperparts are gray. Their throat is a creamier white than the male's and the rest of their underparts are whiter than the male's.
分类信息
The Aripuana antwren was first discovered in 1986 and at the time was thought to be a subpopulation of the black-capped antwren (H. atriacapillus). It was recognized as a species and so described in 2013 and recognition by regional and worldwide taxonomic systems followed. Its specific epithet honors the discoverer Douglas Stotz.<p>The Aripuana antwren is monotypic.
- 学名
- Herpsilochmus stotzi
- 命名信息
- Whitney, Cohn-Haft, Bravo, Schunck & Silveira, 2013
- 目
- Passeriformes
- 科
- Thamnophilidae
- 属
- Herpsilochmus
分布与栖息地
The Aripuana antwren was first described from the area between the rios Aripuanã and Machado (the interfluvium) in Rondônia. It is now known somewhat more widely along the right bank of the Rio Madeira and along the Rio Roosevelt in more of Rondônia, southeastern Amazonas, and northwestern Mato Grosso. It primarily inhabits old-growth campinarana forest on nutrient-poor soil. The trees seldom exceed 20 m (66 ft) in height. It also occurs in tall undisturbed terra firme where it favors areas with Lepidocaryum tenue palms.
- 迁徙
- Resident species
行为
The Aripuana antwren is believed to be a year-round resident throughout its range.<p>The Aripuana antwren's diet is known only from the stomach contents of specimens, which were the remains of insects and spiders. It forages singly, in pairs, and in family groups and frequently as a member of a mixed-species feeding flock. It mostly forages in the canopy by gleaning prey from vegetation.<p>The Aripuana antwren is believed to nest in July and August but nothing else is known about its breeding biology.<p>The Aripuana antwren's song is a "soft, purring, rolling trill that decelerates strongly throughout". The song is part of the evidence for its treatment as a species, as it lacks distinct notes before the trill that visually similar others of its genus have, and the trill has a different pace from theirs. Its most often heard call is a "tchwee" and it also utters "a very short, sharp 'chew' " singly or in series.
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Rufous-tailed Jacamar
Galbula ruficauda
Handsome, slender, green-and-rusty bird of humid tropical lowlands. Lives in evergreen forest, often at edges and around adjacent clearings. Perches upright at mid-heights on vines or other exposed perches and sallies out for flying insects, especially butterflies, dragonflies, and wasps. Note the very long, slender black bill (like a giant hummingbird). Throat is white on male and buffy on female. Loud shrieking calls may draw attention.
Ibera Seedeater
Sporophila iberaensis
Very localized and poorly-known seedeater. Mostly known from northeastern Argentina and southern Paraguay, but also a disjunct cluster of records in Bolivia. Might undergo seasonal movements. Males have blackish or dark brown throat and cheek (sometimes extending onto nape and upper breast), gray crown, and unmarked tan underparts. Females are pale sandy-brown overall; note dark bill. Look for pairs or small flocks in open grassy habitats, often mixed with other seedeaters.
Southern Sooty-Woodpecker
Mulleripicus fuliginosus
A large woodpecker of lowland forest in the southern Philippines. Overall sooty-gray with a fairly long pointed tail, fine speckling on the head, pale eyes, and an ivory-colored bill. Male has a red mark from the base of the bill to the cheek. Occurs together with Buff-spotted Flameback and White-bellied Woodpecker, but has a plain gray belly. Voice includes high-pitched chips and squeals.
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