Seychelles Swiftlet vs Alpine Swift
Aerodramus elaphrus comparado con Tachymarptis melba
Side-by-Side Comparison
| Atributo | Seychelles Swiftlet | Alpine Swift |
|---|---|---|
| Nombre científico | Aerodramus elaphrus | Tachymarptis melba |
| Orden | Caprimulgiformes | Caprimulgiformes |
| Familia | Apodidae | Apodidae |
| Estado de conservación | Vulnerable | Least Concern |
| Longitud | — | — |
| Envergadura | 22,6 cm (8.9 in) | 43,9 cm (17.3 in) |
| Peso | 11,266666666666666 g (0.40 oz) | 97,5 g (3.44 oz) |
| Dieta | Feeds aerially on tiny flying insects and drifting spiders; often forages in mixed-species flocks over … | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| Tamaño de la puesta | 1 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Ninguno
Seychelles Swiftlet only
Alpine Swift only
Ninguno
Song & Call Comparison
Seychelles Swiftlet
Rapid twittering; thin 'tsit-tsit' over Seychelles islands; audible echolocation clicks in caves; endangered endemic; calls weakly in small flocks over forest and coast
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
Geographic Range & Migration
Seychelles Swiftlet
Endemic to the Seychelles Islands in the western Indian Ocean. Resident on the main granitic islands including Mahé. Nests in sea caves.
Alpine Swift
Breeds from southern Europe and North Africa east through Central Asia and the Himalayas to India. Migratory; winters in sub-Saharan Africa.
Estado de conservación
Seychelles Swiftlet
Alpine Swift
How to Tell Them Apart
Seychelles Swiftlet
Small; dark brownish-grey upperparts with slight gloss; pale grey-buff rump band; underparts whitish-grey; forked tail; Seychelles endemic and vulnerable due to restricted range; slightly larger and less glossy than sympatric …
Alpine Swift
Large; dark brown upperparts; white throat patch separated from white belly by dark brown breast band; brown flanks; bold tricoloured underpart pattern; one of Europe's largest swifts with distinctive white …
About These Birds
Seychelles Swiftlet
El vencejo de las Seychelles es endémico de las Seychelles graníticas. Anida en cuevas y cavidades rocosas. Con una distribución muy restringida, la especie es vulnerable a los cambios medioambientales. Familia Apodidae.
Alpine Swift
A large swift (20-22 cm, wingspan 54-60 cm) with a white belly and throat contrasting with dark brown upperparts. Found from southern Europe and Africa to Central Asia. Aerial insectivore, foraging at great heights. Nests on cliff faces in large colonies. Powerful, fast flier.