Palau Swiftlet vs White-collared Swift
Aerodramus pelewensis 比較対象 Streptoprocne zonaris
Side-by-Side Comparison
| 属性 | Palau Swiftlet | White-collared Swift |
|---|---|---|
| 学名 | Aerodramus pelewensis | Streptoprocne zonaris |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Least Concern | Least Concern |
| 体長 | — | — |
| 翼開長 | 21.5 cm (8.5 in) | 42.5 cm (16.7 in) |
| 体重 | 13.3 g (0.47 oz) | 106.45 g (3.75 oz) |
| 食性 | Aerial plankton specialist catching tiny flies, gnats, and airborne spiders in tight acrobatic flight. | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| 一腹卵数 | 1 | 2 |
| 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
White-collared Swift
Loud, screaming 'shreee-shreee'; powerful screeching trill; calls from large flocks over mountains; very audible; one of the loudest Neotropical swifts; alarm a harsh rattle
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.
White-collared Swift
Found from Mexico south through Central America to South America east of the Andes, reaching Bolivia and southern Brazil. Often in large flocks.
保全状況
Palau Swiftlet
White-collared 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.
White-collared Swift
Large; glossy blue-black plumage with bold broad white collar encircling entire neck; collar clean and complete; underparts black; large slightly forked tail; among the most recognisable Neotropical swifts due to …
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.
White-collared Swift
ホワイトカラードスウィフトはラテンアメリカ全域の山岳地帯に広く分布し、白い首輪が特徴的な大型のアマツバメである。