Great Dusky Swift vs Philippine Spinetail
Cypseloides senex 비교 대상 Mearnsia picina
Side-by-Side Comparison
| 속성 | Great Dusky Swift | Philippine Spinetail |
|---|---|---|
| 학명 | Cypseloides senex | Mearnsia picina |
| 목 | Caprimulgiformes | Caprimulgiformes |
| 과 | Apodidae | Apodidae |
| 보전 상태 | Least Concern | Near Threatened |
| 체장 | — | — |
| 날개 폭 | 33.8 cm (13.3 in) | 32.3 cm (12.7 in) |
| 체중 | 83.0 g (2.93 oz) | 11.5 g (0.41 oz) |
| 식성 | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … | Aerial diet of small flying insects and spiders; forages at speed over forest and open … |
| 산란 수 | 1-2 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Great Dusky Swift
Loud, churring trill; harsher and louder than other Cypseloides; calls over Iguacu Falls and major Neotropical waterfalls; buzzy 'bzzzt-bzzzt' in aerial groups
Philippine Spinetail
High-pitched, buzzy twittering; sharp 'tsit-tsit' in fast low-level flight over Philippine forest; calls rapidly in tight flocks; distinctive wing sound in fast aerial display
Geographic Range & Migration
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
Philippine Spinetail
Endemic to the Philippines, found on Mindanao and adjacent southern islands. Resident in lowland and hill forest and edge. Uncommon.
보전 상태
Great Dusky Swift
Philippine Spinetail
How to Tell Them Apart
Great Dusky Swift
Very large; entirely dark sooty-brown with pale grey forehead and chin scaling; slightly paler underparts; broad wings; largest Cypseloides swift; South American waterfall specialist with dusky uniform plumage and imposing …
Philippine Spinetail
Tiny but long-winged; dark blackish-brown overall; pale grey-white throat and chin; short spiny tail projections visible at close range; Philippine endemic; small size contrasts with proportionally very long scythe-like wings.
About These Birds
Great Dusky Swift
18–20 cm의 대형 칼새로 브라질 동남부·파라과이 동부·아르헨티나 북동부에 서식. 어두운 그을린 갈색 깃털. 삼림 협곡과 폭포 위를 날며 먹이를 구하는 공중 곤충식성. 폭포 뒤에 대규모 집단으로 둥지를 튼다. Cypseloides 속의 가장 큰 종.
Philippine Spinetail
소형 칼새로 체장 약 11cm이며, 검은색 몸통에 흰색 허리 반점이 있다. 필리핀 특정 섬 숲 상공에 서식하는 고유종이다. 공중에서 곤충을 잡아먹으며, 절벽이나 동굴 벽에 둥지를 튼다. 관심 필요 종이다.