Mariana Swiftlet vs African Palm Swift
Aerodramus bartschi comparado con Cypsiurus parvus
Side-by-Side Comparison
| Atributo | Mariana Swiftlet | African Palm Swift |
|---|---|---|
| Nombre científico | Aerodramus bartschi | Cypsiurus parvus |
| Orden | Caprimulgiformes | Caprimulgiformes |
| Familia | Apodidae | Apodidae |
| Estado de conservación | Vulnerable | Least Concern |
| Longitud | — | — |
| Envergadura | 17,7 cm (7.0 in) | 27,2 cm (10.7 in) |
| Peso | 7,25 g (0.26 oz) | 14,38 g (0.51 oz) |
| Dieta | 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. |
| Tamaño de la puesta | 1 | 1-3 |
| Population Trend | — | — |
Habitat Comparison
Hábitats compartidos
Mariana Swiftlet only
Ninguno
African Palm Swift only
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.
Estado de conservación
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
El vencejo de Guam es endémico de Guam y las islas Marianas del Norte. Considerado En Peligro por la destrucción del hábitat y los depredadores introducidos. Nidifica en cuevas y acantilados. Familia Apodidae.
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.