Bare-legged Swiftlet vs African Swift
Aerodramus nuditarsus مقارنةً بـ Apus barbatus
Side-by-Side Comparison
| السمة | Bare-legged Swiftlet | African Swift |
|---|---|---|
| الاسم العلمي | Aerodramus nuditarsus | Apus barbatus |
| الرتبة | Caprimulgiformes | Caprimulgiformes |
| الفصيلة | Apodidae | Apodidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 25,0 cm (9.8 in) | 34,2 cm (13.5 in) |
| الوزن | 13,3 g (0.47 oz) | 42,666666666666664 g (1.51 oz) |
| النظام الغذائي | 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 … |
| عدد البيض في الوضع | -- | 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.
حالة الحفاظ
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
A small swiftlet (10-11 cm) found in New Guinea, particularly in lowland and hill forests. Distinguished by its bare, featherless tarsi. Dark plumage. Aerial insectivore. Colonial cave nester. Uses echolocation for cave navigation. Limited published ecological data.
African Swift
A medium-sized swift (16-17 cm) found across sub-Saharan Africa. Dark sooty-brown plumage, darker than Pallid Swift. Aerial insectivore, foraging high over varied habitats from forests to savannas. Breeds on cliffs and buildings. Resident or partial migrant within Africa.