Atiu Swiftlet vs White-collared Swift
Aerodramus sawtelli comparado con Streptoprocne zonaris
Side-by-Side Comparison
| Atributo | Atiu Swiftlet | White-collared Swift |
|---|---|---|
| Nombre científico | Aerodramus sawtelli | Streptoprocne zonaris |
| Orden | Caprimulgiformes | Caprimulgiformes |
| Familia | Apodidae | Apodidae |
| Estado de conservación | Vulnerable | Least Concern |
| Longitud | — | — |
| Envergadura | 23,2 cm (9.1 in) | 42,5 cm (16.7 in) |
| Peso | 8,6 g (0.30 oz) | 106,45 g (3.75 oz) |
| Dieta | Small aerial insectivore feeding on minute flying insects and spiders; forages over forest canopy and … | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. |
| Tamaño de la puesta | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Atiu Swiftlet
Very high thin twittering; 'tsit' calls over Cook Islands; audible echolocation clicks inside Atiu makatea caves; vulnerable endemic; vocal near cave entrances only
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
Atiu Swiftlet
Endemic to Atiu Island in the southern Cook Islands. Resident on this single island; nests in limestone caves. Small and vulnerable 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.
Estado de conservación
Atiu Swiftlet
White-collared Swift
How to Tell Them Apart
Atiu Swiftlet
Tiny; dark grey-brown upperparts; pale grey rump band; underparts whitish-grey; forked tail; Cook Islands endemic restricted to Atiu Island; extremely small range and vulnerable status; plumage similar to Polynesian Swiftlet.
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
Atiu Swiftlet
A small swiftlet (10 cm) endemic to the island of Atiu in the Cook Islands of the South Pacific. Dark plumage. Aerial insectivore. Nests in small caves and sinkholes (makatea) on the raised coral island. One of the most range-restricted swiftlets, with a tiny population.
White-collared Swift
A very large swift (20-22 cm, wingspan 45-55 cm) with a bold white collar band, the largest New World swift. Found from Mexico to southern Brazil and the Caribbean. Aerial insectivore, foraging in large, noisy flocks over forests and cities. Nests behind waterfalls and in caves.