Pacific Swift vs Chestnut-collared Swift
Apus pacificus เปรียบเทียบกับ Streptoprocne rutila
Side-by-Side Comparison
| คุณสมบัติ | Pacific Swift | Chestnut-collared Swift |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Apus pacificus | Streptoprocne rutila |
| อันดับ | Caprimulgiformes | Caprimulgiformes |
| วงศ์ตระกูล | Apodidae | Apodidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 34.6 cm (13.6 in) | 26.0 cm (10.2 in) |
| น้ำหนัก | 41.516666666666666 g (1.46 oz) | 21.8 g (0.77 oz) |
| อาหาร | Feeds aerially on tiny insects and spiders, often following weather fronts where aerial plankton concentrates. | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … |
| จำนวนไข่ | 1-3 | 2 |
| Population Trend | — | — |
Habitat Comparison
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Pacific Swift only
Chestnut-collared Swift only
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Song & Call Comparison
Pacific Swift
Thin, reedy trill with nasal overtone; soft chattering notes delivered continuously during rapid low-level flight over fields.
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
Pacific Swift
Breeds from Siberia and Japan south to China and the Himalayas. Long-distance migrant wintering in Southeast Asia and Australia.
Chestnut-collared Swift
Found from Mexico and the Caribbean south through Central America and South America to Argentina. Resident in highlands near mountain cliffs.
สถานะการอนุรักษ์
Pacific Swift
Chestnut-collared Swift
How to Tell Them Apart
Pacific Swift
Dark blackish-brown upperparts; distinctive white rump patch contrasting with dark back; white throat patch; underparts dark with pale brown barring; deeply forked tail; white rump distinguishes it from Common Swift …
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
Pacific Swift
A medium-sized swift (17-18 cm) found across eastern Asia from Siberia to Australia. Dark plumage with a white rump patch and deeply forked tail. Aerial insectivore. A long-distance migrant, breeding in Asia and wintering in Southeast Asia and Australasia.
Chestnut-collared Swift
A small swift (13-14 cm) found from Mexico through Central America and South America to Bolivia and Brazil. Dark plumage with a distinctive chestnut collar and throat. Aerial insectivore, often foraging in mixed-species swift flocks over forests and highlands.