Spot-fronted Swift vs Great Dusky Swift
Cypseloides cherriei 비교 대상 Cypseloides senex
Side-by-Side Comparison
| 속성 | Spot-fronted Swift | Great Dusky Swift |
|---|---|---|
| 학명 | Cypseloides cherriei | Cypseloides senex |
| 목 | Caprimulgiformes | Caprimulgiformes |
| 과 | Apodidae | Apodidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 25.0 cm (9.8 in) | 33.8 cm (13.3 in) |
| 체중 | 22.725 g (0.80 oz) | 83.0 g (2.93 oz) |
| 식성 | Feeds aerially on tiny insects and spiders, often following weather fronts where aerial plankton concentrates. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 산란 수 | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Spot-fronted Swift
Soft 'chip-chip' notes; thin, quiet twittering in flight; calls over Colombian waterfalls and mountain streams; high-pitched weak trills; rarely vocal away from breeding
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
Geographic Range & Migration
Spot-fronted Swift
Found in disjunct montane populations from Costa Rica and Venezuela south to Ecuador. Rare; associated with waterfalls at 600–2,000 m elevation.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
보전 상태
Spot-fronted Swift
Great Dusky Swift
How to Tell Them Apart
Spot-fronted Swift
Sooty-black overall with distinctive white-spotted forehead; throat shows pale grey-white scaling; no other markings; dark uniform body contrasts with the unique white-spotted loral and frontal spots that name the species.
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 …
About These Birds
Spot-fronted Swift
13–14 cm의 중형 어두운 칼새로 코스타리카·서부 파나마의 산지림에 서식. 흰 눈 앞 반점이 있는 그을린 흑색 깃털. 삼림 계곡과 산등성이 위 높은 곳에서 채이며 먹이를 구하는 공중 곤충식성. 희귀하고 잘 알려지지 않음; 준위협으로 분류.
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.