Volcano Swiftlet vs Chestnut-collared Swift
Aerodramus vulcanorum в сравнении с Streptoprocne rutila
Side-by-Side Comparison
| Характеристика | Volcano Swiftlet | Chestnut-collared Swift |
|---|---|---|
| Научное название | Aerodramus vulcanorum | Streptoprocne rutila |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Apodidae | Apodidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 24,0 cm (9.4 in) | 26,0 cm (10.2 in) |
| Масса | 14,4 g (0.51 oz) | 21,8 g (0.77 oz) |
| Питание | Entirely aerial diet of tiny insects and spiders; forages in large flocks over open country … | Entirely airborne feeder on tiny flies, gnats, and airborne arachnids; one of the most aerial … |
| Размер кладки | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Volcano Swiftlet
High twittering calls; thin 'tsit' notes over Javan volcanic mountains; echolocation clicks in cave roosts; slightly larger than many swiftlets; calls produce soft chattering
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
Volcano Swiftlet
Endemic to the volcanoes of Java at 1,000–3,400 m. Resident in montane forest near active and dormant craters. Very restricted range.
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
Volcano Swiftlet
Chestnut-collared Swift
How to Tell Them Apart
Volcano Swiftlet
Small; dark sooty-brown upperparts; grey-brown rump barely paler than back; underparts dark grey-brown; forked tail; restricted to Java's volcanoes; notably lacks a distinct pale rump band contrasting with the 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
Volcano Swiftlet
A small swiftlet (10-11 cm) endemic to highland volcanic areas of Java, Sumatra, and Bali, Indonesia. Dark plumage. Aerial insectivore, foraging over montane forests above 1,000 m. Colonial nester in volcanic caves. Closely related to Himalayan Swiftlet.
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.