Whitehead's Swiftlet vs Great Dusky Swift
Aerodramus whiteheadi 비교 대상 Cypseloides senex
Side-by-Side Comparison
| 속성 | Whitehead's Swiftlet | Great Dusky Swift |
|---|---|---|
| 학명 | Aerodramus whiteheadi | Cypseloides senex |
| 목 | Caprimulgiformes | Caprimulgiformes |
| 과 | Apodidae | Apodidae |
| 보전 상태 | Data Deficient | Least Concern |
| 체장 | — | — |
| 날개 폭 | 27.2 cm (10.7 in) | 33.8 cm (13.3 in) |
| 체중 | 14.0 g (0.49 oz) | 83.0 g (2.93 oz) |
| 식성 | Aerial plankton feeder taking tiny midges, fungus gnats, and ballooning spiders in rapid coursing flights. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| 산란 수 | -- | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Whitehead's Swiftlet
Thin twittering; 'chip-chip' calls over Borneo highlands; echolocation clicks in cave roosts; data deficient; calls poorly documented from remote Bornean montane habitat
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
Whitehead's Swiftlet
Endemic to the highlands of Borneo at 800–3,000 m. Resident in montane forest on Mount Kinabalu and the Crocker Range.
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
Whitehead's Swiftlet
Great Dusky Swift
How to Tell Them Apart
Whitehead's Swiftlet
Small; dark brownish-grey upperparts; pale buff-grey rump band; underparts pale grey-white; forked tail; Philippine endemic from Luzon; data-deficient species differing from Philippine Swiftlet mainly in habitat preference and island range.
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
Whitehead's Swiftlet
필리핀 루손 북부 산지에 고유하게 서식하는 작은 칼새류(11~12cm). 연한 허리 반점이 있는 어두운 깃털. 공중 식충성이다.
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.