Caroline Swiftlet vs Chestnut-collared Swift
Aerodramus inquietus 对比 Streptoprocne rutila
Side-by-Side Comparison
| 属性 | Caroline Swiftlet | Chestnut-collared Swift |
|---|---|---|
| 学名 | Aerodramus inquietus | Streptoprocne rutila |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 22.8 cm (9.0 in) | 26.0 cm (10.2 in) |
| 体重 | 11.0 g (0.39 oz) | 21.8 g (0.77 oz) |
| 食性 | Feeds on aerial plankton including tiny flies and spiders; forages in large noisy flocks above … | 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
Caroline Swiftlet
Thin twittering calls; 'tsit-tsit' over Caroline Islands; echolocation clicks in cave roosts; moderate-pitched for swiftlet; produces soft chattering at colonial nesting sites
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
Caroline Swiftlet
Found across the Caroline Islands of Micronesia including Pohnpei and Chuuk. Resident in lowland forest and cave systems.
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
Caroline Swiftlet
Chestnut-collared Swift
How to Tell Them Apart
Caroline Swiftlet
Small; dark grey-brown upperparts; pale buff rump band; underparts pale greyish-white; forked tail; Micronesian endemic from Caroline Islands; very similar to Palau Swiftlet but distributed on a distinct island group.
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
Caroline Swiftlet
一种小型金丝燕（体长10-11厘米），特产于密克罗尼西亚卡罗林群岛（波纳佩岛、科斯雷岛）。体羽深色。属雨燕科（Apodidae），是太平洋岛屿的特有种。
Chestnut-collared Swift
栗领雨燕栖息于中美洲和南美洲北部的山地。