Bare-legged Swiftlet vs African Swift
Aerodramus nuditarsus 비교 대상 Apus barbatus
Side-by-Side Comparison
| 속성 | Bare-legged Swiftlet | African Swift |
|---|---|---|
| 학명 | Aerodramus nuditarsus | Apus barbatus |
| 목 | Caprimulgiformes | Caprimulgiformes |
| 과 | Apodidae | Apodidae |
| 보전 상태 | Least Concern | Least Concern |
| 체장 | — | — |
| 날개 폭 | 25.0 cm (9.8 in) | 34.2 cm (13.5 in) |
| 체중 | 13.3 g (0.47 oz) | 42.666666666666664 g (1.51 oz) |
| 식성 | Obligate aerial insectivore; catches minute flies, beetles, and aerial spiders while foraging near cave roosts. | Completely aerial diet of small flying insects and spiders; never forages on the ground or … |
| 산란 수 | -- | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Bare-legged Swiftlet
High thin twittering; 'tsit-tsit' over New Guinea lowlands; echolocation clicks in cave roosts; calls weakly in flight; colonial nester producing soft flock chattering
African Swift
Sharp, piercing screech followed by rapid chatter; intense series of notes escalating in speed and volume before fading.
Geographic Range & Migration
Bare-legged Swiftlet
Found in lowland New Guinea and adjacent islands. Resident in lowland rainforest and forest edge. Little-known Papuan endemic.
African Swift
Found across sub-Saharan Africa from Senegal east to Ethiopia and south to South Africa. One of Africa's most common swift species.
보전 상태
Bare-legged Swiftlet
African Swift
How to Tell Them Apart
Bare-legged Swiftlet
Small; dark grey-brown upperparts; pale rump band; underparts whitish-grey; forked tail; bare unfeathered tarsi distinctive among swiftlets; New Guinea lowland cave-nesting species; bare legs visible at nest but rarely field-observable.
African Swift
Dark sooty-brown throughout; pale throat patch whitish-grey; underparts slightly paler; broadly similar to Common Swift but slightly larger and marginally paler below; widespread Sub-Saharan African species.
About These Birds
Bare-legged Swiftlet
특히 저지대와 구릉지 삼림의 뉴기니에 서식하는 작은 칼새류(10~11cm). 비늘 없는 발가락이 특징이다. 공중 식충성이다.
African Swift
아프리카 칼새는 사하라 이남 아프리카 전역에 분포하는 중간 크기의 칼새입니다. 검은 깃털과 흰 목이 특징이며, 절벽과 건물에서 집을 짓고 높은 곳에서 날아오르며 먹이를 잡습니다.