Mariana Swiftlet vs African Palm Swift
Aerodramus bartschi verglichen mit Cypsiurus parvus
Side-by-Side Comparison
| Merkmal | Mariana Swiftlet | African Palm Swift |
|---|---|---|
| Wissenschaftlicher Name | Aerodramus bartschi | Cypsiurus parvus |
| Ordnung | Caprimulgiformes | Caprimulgiformes |
| Familie | Apodidae | Apodidae |
| Erhaltungsstatus | Vulnerable | Least Concern |
| Länge | — | — |
| Flügelspannweite | 17,7 cm (7.0 in) | 27,2 cm (10.7 in) |
| Gewicht | 7,25 g (0.26 oz) | 14,38 g (0.51 oz) |
| Ernährung | Entirely airborne insectivore; feeds on minute flying insects and web-dispersing spiders over open habitats. | Exclusively aerial diet; consumes tiny flying insects and spiders, sometimes following insect swarms for km. |
| Gelegegröße | 1 | 1-3 |
| 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 Palm Swift
Deep, hollow churring trill with resonant bass quality; prolonged vibrating call audible at significant range in open woodland.
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 Palm Swift
Found across sub-Saharan Africa from Senegal east to Somalia and south to South Africa. Common in open areas near palms; nests in palm leaves.
Erhaltungsstatus
Mariana Swiftlet
African Palm 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 Palm Swift
Slender and long-tailed; uniformly pale greyish-brown overall; underparts paler grey-buff; long deeply forked tail; pale uniform appearance with no contrasting markings; widespread African palm-nesting swift with distinctive slender silhouette.
About These Birds
Mariana Swiftlet
A small swiftlet (10-11 cm) endemic to the Mariana Islands of the western Pacific (Guam, Saipan, Rota, Tinian). Dark brown plumage. Aerial insectivore. Colonial cave nester using echolocation. Population severely declined on Guam due to the brown tree snake.
African Palm Swift
A slender swift (15-17 cm) with long, narrow wings and a deeply forked tail. Dark brown plumage. Found across sub-Saharan Africa in savanna and open woodland, closely associated with palm trees. Aerial insectivore. One of Africa's most abundant swift species.