Palau Swiftlet vs Alpine Swift
Aerodramus pelewensis ile kıyaslandığında Tachymarptis melba
Side-by-Side Comparison
| Özellik | Palau Swiftlet | Alpine Swift |
|---|---|---|
| Bilimsel Ad | Aerodramus pelewensis | Tachymarptis melba |
| Takım | Caprimulgiformes | Caprimulgiformes |
| Familya | Apodidae | Apodidae |
| Koruma Durumu | Least Concern | Least Concern |
| Uzunluk | — | — |
| Kanat Açıklığı | 21,5 cm (8.5 in) | 43,9 cm (17.3 in) |
| Ağırlık | 13,3 g (0.47 oz) | 97,5 g (3.44 oz) |
| Beslenme | Aerial plankton specialist catching tiny flies, gnats, and airborne spiders in tight acrobatic flight. | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| Kuluçka Büyüklüğü | 1 | 1-4 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Palau Swiftlet
Rapid thin twittering; high 'tsit' notes over Palau islands; audible echolocation clicks in cave and building roosts; endemic island species; calls weakly in small flocks
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
Geographic Range & Migration
Palau Swiftlet
Endemic to the Palau Islands in Micronesia. Resident on all major islands; nests in limestone caves. Small but stable population.
Alpine Swift
Breeds from southern Europe and North Africa east through Central Asia and the Himalayas to India. Migratory; winters in sub-Saharan Africa.
Koruma Durumu
Palau Swiftlet
Alpine Swift
How to Tell Them Apart
Palau Swiftlet
Small; dark grey-brown upperparts; pale buff-grey rump band; underparts pale greyish-white; forked tail; Palau Island endemic; closely resembles Caroline Swiftlet but restricted to Palau and differing in subtle measurements.
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
Palau Swiftlet
A small swiftlet (10-11 cm) endemic to the Palau archipelago in the western Pacific. Dark plumage. Aerial insectivore, foraging over forested limestone islands. Colonial cave nester. Population restricted to the Palau island chain. Classified as Near Threatened.
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.