Ayacucho Thistletail
Asthenes ayacuchensis
Poorly known thistletail found only in a small area of the high Andes east of the city of Ayacucho in southern Peru. It is brown above, gray below, with a long wispy tail and a reddish-orange chin patch. It has a darker chin patch than Vilcabamba Thistletail and Puna Thistletail, and is not known to overlap with either species. It inhabits scrub and stunted forest near treeline. Song is a rapid, high-pitched trill.
识别特征
The Ayacucho thistletail is 18 to 20 cm (7.1 to 7.9 in) long. The sexes have the same plumage. Adults have a brownish face with a paler brown supercilium. Their crown is brownish faintly spotted with black. Their back and rump are brownish and their wings dark brown with rufous edges to the feathers. Their tail is a paler but more rufescent brown than the back; it is long and deeply forked with few barbs at the feather ends that give a ragged appearance. Their chin is grayish with a bright reddish chestnut center and the rest of their underparts are a plain darker grayish. Their iris is dark brown, their bill blackish to dark gray with sometimes a pale base to the mandible, and their legs and feet dark bluish gray.
分类信息
The Ayacucho thistletail was originally described as a subspecies of the white-chinned thistletail (then Schizoeaca fuliginosa, now Asthenes fuliginosa). It was later treated as conspecific with what is now the Vilcabamba thistletail (Asthenes vilcabambae). These species and several others were long assigned to genus Schizoeaca but genetic data showed that the genus is embedded within Asthenes. A phylogenetic study published in 2015 that examined both DNA sequence data and vocalizations of members of the genus Asthenes found that the Ayacucho thistletail was more similar to the eye-ringed thistletail than it was to the Vilcabamba thistletail. Based on this evidence it was elevated to species rank.<p>The Ayacucho thistletail is monotypic.
- 学名
- Asthenes ayacuchensis
- 命名信息
- (Vaurie, Weske & Terborgh, 1972)
- 目
- Passeriformes
- 科
- Furnariidae
- 属
- Asthenes
分布与栖息地
The Ayacucho thistletail is found in the northern part of Peru's Department of Ayacucho west of the Apurímac River. It primarily inhabits elfin forest and Polylepis woodlands in the tree line ecotone. It favors areas with dense stands of Chusquea bamboo. In elevation it ranges mostly between 3,300 and 3,700 m (10,800 and 12,100 ft).
- 迁徙
- Resident species
行为
The Ayacucho thistletail is believed to be a year-round resident throughout its range.<p>The Ayacucho thistletail's diet and foraging behavior are essentially unknown. It is usually seen singly or in pairs. It is assumed to feed mostly on arthropods that it gleans from foliage.<p>Nothing is known about the Ayacucho thistletail's breeding biology.<p>The Ayacucho thistletail's primary song is "a rapid, high-pitched, even trill lasting two seconds in duration, delivered at a steady frequency". Its main call is a high-pitched "pyeek".
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Moustached Babbler
Malacopteron magnirostre
Dull gray-brown babbler with a white belly. Namesake moustache is often faint and difficult to see. Sooty-capped Babbler is extremely similar but has a darker brown crown, a darker tail, and no moustache at all. Found in lowland and hill forests. Forages at middle and lower levels, clambering around on branches and trunks in small-to-medium-sized flocks, sometimes with other species. Sings a whistled series of descending notes; pairs often engage in duets. Calls include soft chips and raspy notes.
Green-breasted Mango
Anthracothorax prevostii
Large, bulky hummingbird with slightly arched black bill. Favors forest edge and open areas with scattered tall trees. Often perches and feeds high in canopy, but also feeds low on occasions and will visit feeders. Male (some females similar) solidly dark, deep green overall with black throat, purplish tail. Female and immature have broad dark stripe down center of throat and breast, white tail corners. Immature also has rusty mottling along sides of throat and breast.
Rose-throated Tanager
Piranga roseogularis
Uncommon in tropical woodland and forest edge of Yucatan Peninsula, mainly at mid-upper levels where often quiet and overlooked easily. Usually seen singly or in pairs. Rather plain, despite the name. Grayish overall with a broken white eye-ring; male has a rose-pink throat and red wash to the crown, wings, and tail; on the female these areas are washed yellowish.
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