Indian Swiftlet vs Chestnut-collared Swift
Aerodramus unicolor เปรียบเทียบกับ Streptoprocne rutila
Side-by-Side Comparison
| คุณสมบัติ | Indian Swiftlet | Chestnut-collared Swift |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Aerodramus unicolor | Streptoprocne rutila |
| อันดับ | Caprimulgiformes | Caprimulgiformes |
| วงศ์ตระกูล | Apodidae | Apodidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 22.7 cm (8.9 in) | 26.0 cm (10.2 in) |
| น้ำหนัก | 11.0 g (0.39 oz) | 21.8 g (0.77 oz) |
| อาหาร | Tiny aerial insectivore taking small flying insects and spiders; congregates where insects emerge over water. | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … |
| จำนวนไข่ | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Indian Swiftlet
Rapid, thin twittering; 'tsit-tsit' calls over South Indian hills; audible echolocation clicks in cave roosts; colonial; calls softly in flight; noisy at roost entrances
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
Indian Swiftlet
Found in Sri Lanka and southwestern India. Resident in hills and lowlands, nesting in rock crevices on cliff faces up to 2,000 m elevation.
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
Indian Swiftlet
Chestnut-collared Swift
How to Tell Them Apart
Indian Swiftlet
Small; uniformly dark blackish-brown throughout with minimal gloss; rump barely paler than back or concolorous; underparts dark grey-brown; forked tail; South Indian and Sri Lankan endemic with exceptionally uniform dark …
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
Indian Swiftlet
A small swiftlet (11-12 cm) found across the Indian subcontinent and Sri Lanka. Dark grey-brown plumage with slightly paler underparts. Aerial insectivore, foraging over forests, towns, and agricultural land. Colonial nester in caves and buildings. Uses simple echolocation clicks.
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.