Mascarene Swiftlet vs Chestnut-collared Swift
Aerodramus francicus 对比 Streptoprocne rutila
Side-by-Side Comparison
| 属性 | Mascarene Swiftlet | Chestnut-collared Swift |
|---|---|---|
| 学名 | Aerodramus francicus | Streptoprocne rutila |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Near Threatened | Least Concern |
| 体长 | — | — |
| 翼展 | 21.8 cm (8.6 in) | 26.0 cm (10.2 in) |
| 体重 | 10.419999999999998 g (0.37 oz) | 21.8 g (0.77 oz) |
| 食性 | Aerial insectivore consuming minute dipterans, midges, and ballooning spiders caught in continuous fast flight. | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … |
| 产卵数 | 1-2 | 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
Chestnut-collared Swift
High, screaming trill; rapid 'scree-scree' in flight; shrill and penetrating; calls over Neotropical mountains and canyon edges; alarm a rapid screeching chatter
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.
Chestnut-collared Swift
Found from Mexico and the Caribbean south through Central America and South America to Argentina. Resident in highlands near mountain cliffs.
保护状况
Mascarene Swiftlet
Chestnut-collared 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.
Chestnut-collared Swift
Dark blackish-brown body with diagnostic rich chestnut collar encircling entire neck; collar bold and complete; underparts slightly paler brown; small swift with striking warm-toned neck band contrasting vividly with dark …
About These Birds
Mascarene Swiftlet
一种小型金丝燕（体长10-11厘米），特产于西印度洋的毛里求斯和留尼汪岛。体羽深褐色。属雨燕科（Apodidae），在岛上的洞穴中繁殖，是两岛的特有种。
Chestnut-collared Swift
栗领雨燕栖息于中美洲和南美洲北部的山地。