Marquesas Swiftlet vs White-chested Swift
Aerodramus ocistus в сравнении с Cypseloides lemosi
Side-by-Side Comparison
| Характеристика | Marquesas Swiftlet | White-chested Swift |
|---|---|---|
| Научное название | Aerodramus ocistus | Cypseloides lemosi |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Apodidae | Apodidae |
| Охранный статус | Not Evaluated | Least Concern |
| Длина | — | — |
| Размах крыльев | — | 30,0 cm (11.8 in) |
| Масса | 9,5 g (0.34 oz) | 28,400000000000002 g (1.00 oz) |
| Питание | Entirely aerial diet of tiny insects and spiders; forages in large flocks over open country … | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| Размер кладки | 1 | -- |
| Population Trend | — | — |
Habitat Comparison
Общие среды обитания
Marquesas Swiftlet only
White-chested Swift only
Song & Call Comparison
Marquesas Swiftlet
High thin twittering; 'chip-chip' over Marquesas Islands; echolocation clicks in cave roosts; poorly documented; thin high-pitched calls typical of small Pacific swiftlets
White-chested Swift
High, thin twittering; soft 'tsit' calls in flight; calls over Colombian waterfalls; very poorly known; thin, reedy contact notes; one of most rarely documented swifts
Geographic Range & Migration
Marquesas Swiftlet
Endemic to the Marquesas Islands of French Polynesia. Resident on major islands including Nuku Hiva and Hiva Oa. Nests in sea caves.
White-chested Swift
Known from Colombia and adjacent Ecuador. One of the world's rarest swifts; recorded at waterfalls in humid forest foothills at 500–1,200 m.
Охранный статус
Marquesas Swiftlet
White-chested Swift
How to Tell Them Apart
Marquesas Swiftlet
Small; dark brownish-grey upperparts; pale buff-grey rump band; underparts pale grey-white; forked tail; Marquesas Islands endemic in French Polynesia; closely related to Polynesian Swiftlet but isolated on its own archipelago.
White-chested Swift
Black upperparts and wings; distinctive large white chest patch contrasting sharply with black throat and belly; white confined to central breast; Colombian endemic with unique bold bicoloured plumage unlike any …
About These Birds
Marquesas Swiftlet
A small swiftlet (10-11 cm) endemic to the Marquesas Islands of French Polynesia. Dark plumage. Aerial insectivore. Colonial cave nester. Population restricted to a few volcanic islands in the central Pacific. Classified as Endangered due to extremely limited range.
White-chested Swift
A medium-sized swift (14-15 cm) endemic to the upper Cauca Valley of Colombia. Sooty-black plumage with a white breast patch. Aerial insectivore of subtropical forests. Classified as Endangered due to extremely restricted range and ongoing habitat loss.