Yellow-breasted Antwren

Herpsilochmus axillaris

Small, warbler-like antbird that usually stays high in the trees. Inhabits cloud forest along the east slope of the Andes; also in the western and central Andes of Colombia. Note yellow underparts, dark wings with white wingbars, and streaky face. Male has a black cap, and female has a chestnut cap. Typically seen with mixed-species flocks in the forest canopy. Frequently given song is a rising and then falling trill.

识别特征

The yellow-breasted antwren is 11 to 12 cm (4.3 to 4.7 in) long and weighs 10 to 13 g (0.35 to 0.46 oz). Adult males of the nominate subspecies H. a. axillaris have a black crown and nape with white spots on the crown and a broken whitish supercilium on an otherwise mottled blackish and yellow-olive face. Their upperparts are olive-gray. Their wings coverts are black with yellow-tinged white edges and tips; their flight feathers are very dark gray. Their tail is mostly dark gray, with white tips and part of the edges of the inner feathers and mostly white outer feathers. Their throat and underparts are mostly pale yellowish olive with a yellow center to the belly. Adult females have a cinnamon-rufous crown, olive-buff upperparts, and darker olive underparts except for the yellow belly center. Their wings and tail are like the male's.<p>Males of subspecies H. a. senex are paler than the nominate, with spots only on the center of their crown and a grayish white throat and breast. Males of subspecies H. a. puncticeps have olive-tinged and grayer upperparts than the nominate and less white on their tail feathers. Females have a dark olive-gray crown with a cinnamon-rufous tinge. Males of subspecies H. a. aequatorialis also have olive-tinged and grayer upperparts than the nominate. Their crown spots are only in the center; they have mostly pale yellow underparts with an olive wash on the sides.

分类信息

The yellow-breasted antwren has these four subspecies:

学名
Herpsilochmus axillaris
命名信息
(Tschudi, 1844)
Passeriformes
Thamnophilidae
Herpsilochmus

分布与栖息地

The subspecies of the yellow-breasted antwren are found thus:<p>The ranges of puncticeps and axillaris have a gap between them.<p>The yellow-breasted antwren inhabits the interior and edges of humid evergreen forest, where it tends to favor the canopy. In elevation it ranges between 800 and 2,000 m (2,600 and 6,600 ft) in Colombia, between 800 and 1,700 m (2,600 and 5,600 ft) in Ecuador, and between 750 and 1,900 m (2,500 and 6,200 ft) in Peru.

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

White-headed Sawwing

White-headed Sawwing

Psalidoprocne albiceps

A small, fork-tailed, sooty-brown swallow with different plumages for the sexes: distinctive male has a pure white head and narrow black eye stripe; female has a mostly ashy head with white throat. Immature lacks white on the head. Pairs use clearings and edges of evergreen forest, open woodland, and cultivation. Resident in East Africa, but an intra-African breeding migrant in Zambia and Malawi between October and May. Superficially more similar to swifts than other swallows. Note the differences in flight style: flightier with deep wing beats and rapid changes of direction, as opposed to the more stiff-winged flight of swifts.

Madagascar Forest Rail

Madagascar Forest Rail

Mentocrex kioloides

Chunky rail with rich rufous coloration and a gray patch on the face. Found on the floor of eastern and northern rainforest, though it nests in trees. Usually in pairs or small groups. Very shy, and looks almost like a mammal when scurrying away from disturbance. Most common call is a long, ringing series of “kheow” notes. Also gives deep grunts and an explosive “tshak” call. Similar to Brown Mesite, but chunkier and shorter-tailed, with darker underparts. Told from Tsingy Wood-Rail by range. Smaller than White-throated Rail, with a shorter bill and a much smaller white throat patch. 

Narrow-billed Tody

Narrow-billed Tody

Todus angustirostris

A small, gemlike species that prefers higher elevation moist woodlands, but also occurs in coffee plantations. The rather large head, long bill, and short tail create a profile shared only by the Broad-billed Tody within its range. Both species have bright green upperparts and a red throat and sides. Note especially the pale eyes of Narrow-billed Tody, as compared to the dark eyes of Broad-billed. Many Broad-billed also have a buff-yellow wash below, which the Narrow-billed lacks. On birds lacking buff below, the Broad-billed can be identified by its all red lower bill, which is black tipped in the Narrow-billed. Further clues to identification include altitude, with this species occurring above 700 meters elevation and the Broad-billed occurring mostly below 700 meters. The Broad-billed also tends to forage higher within woodlands on more open perches. Vocalizations include a buzzy “chik-zhwik” with second note slightly upslurred and a rapid buzzy chatter at about 14 notes per second; compare this with the quick “weep” or “whip” uttered by the Broad-billed.

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