Mariana Swiftlet vs African Swift
Aerodramus bartschi 比較対象 Apus barbatus
Side-by-Side Comparison
| 属性 | Mariana Swiftlet | African Swift |
|---|---|---|
| 学名 | Aerodramus bartschi | Apus barbatus |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保全状況 | Vulnerable | Least Concern |
| 体長 | — | — |
| 翼開長 | 17.7 cm (7.0 in) | 34.2 cm (13.5 in) |
| 体重 | 7.25 g (0.26 oz) | 42.666666666666664 g (1.51 oz) |
| 食性 | Entirely airborne insectivore; feeds on minute flying insects and web-dispersing spiders over open habitats. | Completely aerial diet of small flying insects and spiders; never forages on the ground or … |
| 一腹卵数 | 1 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Mariana Swiftlet
Very high, thin twittering; tiny and high-pitched; 'tsit-tsit' over Guam and Saipan; audible echolocation clicks in cave roosts; endangered; vocal mainly near nesting caves
African Swift
Sharp, piercing screech followed by rapid chatter; intense series of notes escalating in speed and volume before fading.
Geographic Range & Migration
Mariana Swiftlet
Endemic to the Mariana Islands (Guam, Saipan, and adjacent islands). Resident in forested areas; nests in limestone caves. Endangered on Guam.
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.
保全状況
Mariana Swiftlet
African Swift
How to Tell Them Apart
Mariana Swiftlet
Tiny; dark brownish-black upperparts; pale grey-buff rump band; underparts pale whitish-grey; forked tail; Mariana Islands endemic and vulnerable; very small for the genus with concolorous brownish tone and subdued rump …
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
Mariana Swiftlet
グアムアナツバメはグアムとマリアナ諸島に固有のアナツバメで、個体数が減少している絶滅危惧種である。
African Swift
アフリカクロアマツバメはサハラ以南のアフリカに広く分布し、岩壁や建物の隙間に巣を作る。