Cape Verde Swift vs Great Dusky Swift
Apus alexandri 비교 대상 Cypseloides senex
Side-by-Side Comparison
| 속성 | Cape Verde Swift | Great Dusky Swift |
|---|---|---|
| 학명 | Apus alexandri | Cypseloides senex |
| 목 | Caprimulgiformes | Caprimulgiformes |
| 과 | Apodidae | Apodidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 27.5 cm (10.8 in) | 33.8 cm (13.3 in) |
| 체중 | 39.4 g (1.39 oz) | 83.0 g (2.93 oz) |
| 식성 | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 산란 수 | 2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Cape Verde Swift
Soft, musical whistling with smooth melodic quality; clear, unhurried phrases rising and falling gently in warm afternoon air.
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
Cape Verde Swift
Endemic to the Cape Verde Islands in the eastern Atlantic. Resident on several islands including São Vicente and Santo Antão.
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
Cape Verde Swift
Great Dusky Swift
How to Tell Them Apart
Cape Verde Swift
Dark sooty-brown overall; pale grey-white throat patch; underparts slightly paler brown; moderately forked tail; Cape Verde Islands endemic; similar to Common Swift but slightly smaller with more extensive pale throat …
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
Cape Verde Swift
알렉산더 칼새는 카보베르데 제도에만 서식하는 소형 칼새입니다. 집 칼새와 유사하지만 유전적으로 구별되는 고유종으로, 섬 절벽과 건물에서 번식합니다.
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.