Mascarene Swiftlet vs White-chested Swift
Aerodramus francicus compared with Cypseloides lemosi
Side-by-Side Comparison
| Attribute | Mascarene Swiftlet | White-chested Swift |
|---|---|---|
| Scientific Name | Aerodramus francicus | Cypseloides lemosi |
| Order | Caprimulgiformes | Caprimulgiformes |
| Family | Apodidae | Apodidae |
| Conservation Status | Near Threatened | Least Concern |
| Length | — | — |
| Wingspan | 21.8 cm (8.6 in) | 30.0 cm (11.8 in) |
| Weight | 10.419999999999998 g (0.37 oz) | 28.400000000000002 g (1.00 oz) |
| Diet | Aerial insectivore consuming minute dipterans, midges, and ballooning spiders caught in continuous fast flight. | Obligate aerial forager catching small flies, aphids, winged termites, and airborne spiders on the wing. |
| Clutch Size | 1-2 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Mascarene Swiftlet
Thin, rapid chittering; soft 'tsit' notes over Reunion and Mauritius; echolocation clicks in cave roosts; endemic island species; calls weakly; colonial roosting produces faint noise
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
Mascarene Swiftlet
Endemic to the Mascarene Islands of Réunion and Mauritius in the southwestern Indian Ocean. Nests in sea caves and rock crevices.
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.
Conservation Status
Mascarene Swiftlet
White-chested Swift
How to Tell Them Apart
Mascarene Swiftlet
Small; dark blackish-brown upperparts with slight greenish gloss; pale buff-grey rump band; pale grey-white underparts; forked tail; Mascarene Island endemic of Réunion and Mauritius with slightly dusky-toned underparts.
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
Mascarene Swiftlet
A small swiftlet (10-11 cm) endemic to Mauritius and Réunion in the western Indian Ocean. Dark brown plumage. Aerial insectivore, foraging over forest and agricultural areas. Colonial cave nester using echolocation for navigation. Population stable but geographically restricted.
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.