Biscutate Swift vs Alpine Swift
Streptoprocne biscutata 对比 Tachymarptis melba
Side-by-Side Comparison
| 属性 | Biscutate Swift | Alpine Swift |
|---|---|---|
| 学名 | Streptoprocne biscutata | Tachymarptis melba |
| 目 | Caprimulgiformes | Caprimulgiformes |
| 科 | Apodidae | Apodidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 38.4 cm (15.1 in) | 43.9 cm (17.3 in) |
| 体重 | 106.67999999999999 g (3.76 oz) | 97.5 g (3.44 oz) |
| 食性 | Aerial forager on tiny insects and wind-dispersed spiders; forages near water surfaces where insects concentrate. | Aerial insectivore taking small flying insects and spiders; may forage at great heights following thermal … |
| 产卵数 | 1-4 | 1-4 |
| 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
Alpine Swift
Rapid series of short, clipped whistles; bright, clean notes delivered in quick succession with occasional doubled phrase.
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.
Alpine Swift
Breeds from southern Europe and North Africa east through Central Asia and the Himalayas to India. Migratory; winters in sub-Saharan Africa.
保护状况
Biscutate Swift
Alpine 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 …
Alpine Swift
Large; dark brown upperparts; white throat patch separated from white belly by dark brown breast band; brown flanks; bold tricoloured underpart pattern; one of Europe's largest swifts with distinctive white …
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。
Alpine Swift
高山雨燕在欧洲山地和岩壁上繁殖，以白色腹部和较大体型为特征的长距离迁徙鸟类。