Beautiful Treerunner
Margarornis bellulus
Rare but unique within a tiny range near the border of Panama and Colombia. Small brown bird that hitches along mossy limbs in humid cloud forest. Look for a buffy eyebrow, a white throat, and pale spotting on the underparts. Sexes alike. Similar to Pearled Treerunner but no range overlap; also note duller brown (not rufous) upperparts. Typically seen singly or in pairs, often following a mixed-species flock.
识别特征
The beautiful treerunner is 14 to 15 cm (5.5 to 5.9 in) long and weighs 18 to 19 g (0.63 to 0.67 oz). The sexes have the same plumage. Adults have a buffish-white supercilium that extends to the nape, a dull reddish brown line behind the eye, dark brown ear coverts with whitish streaks, and a dark brown "moustache" with white spots that become stripes toward the neck. Their crown is olive brown and their upperparts and wing coverts warm olive-brown. Their flight feathers are dark fuscous with tawny-ochraceous edges. Their tail is dull reddish brown; the ends of the tail feathers lack barbs, giving a spiny appearance. Their throat is whitish and the rest of their underparts rufescent brown. Their upper breast has whitish oval spots with dark brown rims that become narrow stripes on the belly. Their iris is brown, their maxilla brownish, their mandible pinkish, and their legs and feet gray.
分类信息
Some authors have proposed that the beautiful treerunner and the pearled treerunner (M. squamiger) are conspecific or sister species, but these treatments were disproven in a 2011 publication.<p>The beautiful treerunner is monotypic.
- 学名
- Margarornis bellulus
- 命名信息
- Nelson, 1912
- 目
- Passeriformes
- 科
- Furnariidae
- 属
- Margarornis
分布与栖息地
The beautiful treerunner has a disjunct distribution within Panama. It is found in the Serranía de Majé of Panamá Province and in several ranges in the extreme east of Darién Province. It inhabits montane evergreen forest, mostly at elevations between 1,350 and 1,600 m (4,400 and 5,200 ft) but in a few places as low as 900 m (3,000 ft).
- 迁徙
- Resident species
行为
The beautiful treerunner is a year-round resident throughout its range.<p>The beautiful treerunner feeds on arthropods. It usually forages as part of a mixed-species feeding flock. It acrobatically moves through the forest's subcanopy, gleaning prey from branches and epiphytes, sometimes while hanging upside down.<p>Nothing is known about the beautiful treerunner's breeding biology.<p>As of September 2023, xeno-canto and the Cornell Lab of Ornithology's Macaulay Library each had a single recording of a beautiful treerunner call and none of its song.
保护状况
- 种群趋势
- stable
照片
分布
鸟叫声
其他鸟类
Speckled Rail
Laterallus notatus
Very rare and poorly known, but likely widely overlooked, small rail of the southern cone from SE Brazil to central Argentina. Its secretive nature makes it difficult to understand its habitat and habits, but timing of records, combined with records from the middle of downtown Buenos Aires and São Paolo, suggest it is at least somewhat migratory.
Purple Indigobird
Vidua purpurascens
Nest parasite that lays its eggs in the nests of Jameson’s Firefinch. Breeding males are glossy purplish-black, with a pale brownish panel in the wings, while females and non-breeding males are streaky and brown on the back and pale below, with a bold facial pattern. The bill is whitish and the legs very pale pink. Found in forest edge, cultivation, thick woodland, and scrub. Mimics the vocalizations of its host firefinches: a fast trill. Extremely similar to Variable Indigobird. In South Africa, separated by its pale pinkish legs. Elsewhere, breeding males probably slightly more glossy but only separated with certainty by hearing mimicked vocalizations of host species.
Violet Woodhoopoe
Phoeniculus damarensis
An elongated black bird with a coppery-purple metallic sheen and a long, decurved red-orange bill. The juvenile has a dark bill, but is often in the company of adults. The species flies heavily with the white-tipped tail dangling. Pairs and groups of 3-12 are highly social, occupying arid savanna, woodland, and riverine forest along the Namib escarpment, where they nest and roost in natural cavities. They clamber in trees, probing bark and crevices for insects and small vertebrates, and communicate using a strong cackling chatter that is almost maniacal. The almost identical Green Woodhoopoe (with which this species sometimes hybridizes) only differs from Violet Woodhoopoe by having a glossy-greenish (not coppery-purple) metallic sheen.
开始您的观鸟之旅
在户外识别鸟类，并在下一次观察时随手查阅鸟类图鉴。