Pygmy Swiftlet vs Chestnut-collared Swift
Collocalia troglodytes 对比 Streptoprocne rutila
Side-by-Side Comparison
| 属性 | Pygmy Swiftlet | Chestnut-collared Swift |
|---|---|---|
| 学名 | Collocalia troglodytes | Streptoprocne rutila |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 18.6 cm (7.3 in) | 26.0 cm (10.2 in) |
| 体重 | 5.55 g (0.20 oz) | 21.8 g (0.77 oz) |
| 食性 | Obligate aerial insectivore; catches minute flies, beetles, and aerial spiders while foraging near cave roosts. | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … |
| 产卵数 | -- | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Pygmy Swiftlet
Extremely high, thin twittering; among highest-pitched calls of any bird; 'tseee-tseee' barely audible to adults; uses echolocation clicks in Philippine limestone caves
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
Pygmy Swiftlet
Endemic to the Philippines, found on Mindanao and adjacent islands. Resident in lowland forest and coastal caves. One of the smallest swiftlets.
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
Pygmy Swiftlet
Chestnut-collared Swift
How to Tell Them Apart
Pygmy Swiftlet
Tiny; dark blue-black upperparts with faint iridescence; white or pale buff rump band; underparts pale greyish-white; slightly forked tail; one of the smallest swiftlets in the Philippines; cave-nesting with pale …
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
Pygmy Swiftlet
菲律宾金丝燕是菲律宾特有的小型金丝燕，以在石灰岩洞穴中筑巢而闻名。
Chestnut-collared Swift
栗领雨燕栖息于中美洲和南美洲北部的山地。