Spot-fronted Swift
Cypseloides cherriei
Little-known swift found mostly in mountainous areas, though flocks occasionally venture into lowlands. All dark with short square tail and angular wings. Namesake white spots on forehead and behind eyes are distinctive, but these can be extremely difficult to see. Many swifts are best left unidentified. Sex and age variation not well known; some birds, maybe juveniles, can show whitish scaling on belly. Occasionally seen singly or mixed with flocks of other swifts, but most often in monotypic flocks of up to several dozen individuals. Voice can be helpful with practice; typically a staccato chatter followed by “pew pew pew” notes like a laser gun.
识别特征
The spot-fronted swift is about 14 cm (5.5 in) long and weighs about 23 g (0.81 oz). The sexes are alike. They are almost entirely blackish brown with grayish underwings and a white chin. They get their English name from bright white spots on either side of the bill and behind the eyes.
分类信息
The spot-fronted swift is monotypic.
- 学名
- Cypseloides cherriei
- 命名信息
- Ridgway, 1893
- 目
- Apodiformes
- 科
- Apodidae
- 属
- Cypseloides
分布与栖息地
The spot-fronted swift has a scattered distribution. In Costa Rica it is mostly found on the Pacific slope of the Cordillera Central and Cordillera de Talamanca. It is known in Panama from only a few locations and in Colombia and Ecuador from a larger number, though still widely separated. It is almost unknown in far western Venezuela and extreme northern Peru. It mostly inhabits montane forest at elevations between 1,100 and 2,200 m (3,600 and 7,200 ft) but has been documented at 300 m (980 ft) in Ecuador.
- 迁徙
- Resident species
行为
It is not known whether the spot-fronted swift is resident or migratory. There is some evidence of elevational movements, but they could be either migration or daily foraging flights.<p>Like all swifts, the spot-fronted is an aerial insectivore. In one study nearly all of its prey were Hemiptera (true bugs) and Hymenoptera (bees, wasps, and ants). Flocks of up to about 50 may forage together, sometimes with other swifts.<p>The spot-fronted swift's nesting season overall includes at least April to July but varies geographically. It makes a cup nest of moss, ferns, and mud on a vertical rock face near or even directly above water. It lays a single egg. In a Costa Rica study the incubation period was 26 to 28 days and fledging occurred 65 to 70 days after hatch.<p>The spot-fronted swift's flight call has been compared to the sound of laser gun and transliterated as "chirr chi-t-t-ti chirr".
保护状况
- 种群趋势
- declining
照片
分布
鸟叫声
其他鸟类
Pinto's Spinetail
Synallaxis infuscata
Spinetail with a largely dark body contrasting with a rich rusty crown, wings, and tail. Note the streaked whitish throat. In its tiny range, found in the understory at the edge of remnant humid forest fragments and in adjacent second-growth vegetation. The call is a repetition of “teh-teh-teh” notes.
Maroon Oriole
Oriolus traillii
Large, pale-eyed songbird of lower and middle elevations of montane forests. Male blood red with inky black head and wings and dark bill; female similar but less richly colored. Juvenile brown above, pale with dark stippling below, paler bill, and tawny undertail coverts. Birds in Taiwan and central Vietnam are much brighter red overall. Usually seen in pairs or small flocks, sometimes with mixed-species flocks. Pairs often engage in an ethereal duet: male gives a series of melodic notes, to which the female responds with a long, airy whistle. Also gives harsh, rasping calls.
Sahul Cicadabird
Edolisoma tenuirostre
Woodland bird of eastern and northern Australia and New Guinea. Strong sexual dimorphism in plumage. Male dark slaty-gray, with black around bill, and black on wings. Female brown, with dark line through eye, extensive fine barring on chest and belly, and fairly plain brown wings (much browner and lacking the white wingbars of Varied Triller). Shows geographical variation, especially in female plumage. Found in the canopy of a wide variety of forest, woodland, scrub, and savanna habitats. Calls include a long (10-second) sequence of insect-like repeated buzzes (hence its name), also a slower version, and a robin-like sequence of clear whistled notes.
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