Biscutate Swift vs Chestnut-collared Swift
Streptoprocne biscutata в сравнении с Streptoprocne rutila
Side-by-Side Comparison
| Характеристика | Biscutate Swift | Chestnut-collared Swift |
|---|---|---|
| Научное название | Streptoprocne biscutata | Streptoprocne rutila |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Apodidae | Apodidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 38,4 cm (15.1 in) | 26,0 cm (10.2 in) |
| Масса | 106,67999999999999 g (3.76 oz) | 21,8 g (0.77 oz) |
| Питание | 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 … |
| Размер кладки | 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.
Охранный статус
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
A large swift (19-21 cm) similar to White-collared Swift but with two separated white breast patches. Found in southeastern Brazil, eastern Paraguay, and northeastern Argentina. Aerial insectivore, foraging over forested gorges. Nests behind waterfalls in large colonies.
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.