Biscutate Swift vs Chestnut-collared Swift
Streptoprocne biscutata 对比 Streptoprocne rutila
Side-by-Side Comparison
| 属性 | Biscutate Swift | Chestnut-collared Swift |
|---|---|---|
| 学名 | Streptoprocne biscutata | Streptoprocne rutila |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 38.4 cm (15.1 in) | 26.0 cm (10.2 in) |
| 体重 | 106.67999999999999 g (3.76 oz) | 21.8 g (0.77 oz) |
| 食性 | Aerial forager on tiny insects and wind-dispersed spiders; forages near water surfaces where insects concentrate. | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … |
| 产卵数 | 1-4 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Biscutate Swift
Loud, screeching trill; powerful 'schreeee' calls; similar to White-collared Swift but slightly lower; calls in large flocks over Brazilian mountains and waterfalls
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
Biscutate Swift
Found in Brazil, Bolivia, and Paraguay in eastern South America. Resident in forest and open terrain; nests on rock faces.
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
Biscutate Swift
Chestnut-collared Swift
How to Tell Them Apart
Biscutate Swift
Large; blackish-brown with white collar interrupted at centre of nape creating two white patches rather than a complete ring; South American species readily distinguished from White-collared Swift by broken collar …
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
Biscutate Swift
双盾雨燕栖息于巴西东部山地，以独特的两片白色盾状纹为特征的雨燕。
Chestnut-collared Swift
栗领雨燕栖息于中美洲和南美洲北部的山地。