Pale-rumped Swift vs Great Dusky Swift
Chaetura egregia เปรียบเทียบกับ Cypseloides senex
Side-by-Side Comparison
| คุณสมบัติ | Pale-rumped Swift | Great Dusky Swift |
|---|---|---|
| ชื่อวิทยาศาสตร์ | Chaetura egregia | Cypseloides senex |
| อันดับ | Caprimulgiformes | Caprimulgiformes |
| วงศ์ตระกูล | Apodidae | Apodidae |
| สถานะการอนุรักษ์ | Least Concern | Least Concern |
| ความยาว | — | — |
| กว้างปีก | 23.4 cm (9.2 in) | 33.8 cm (13.3 in) |
| น้ำหนัก | 23.68 g (0.84 oz) | 83.0 g (2.93 oz) |
| อาหาร | Obligate aerial insectivore; gathers small flying insects, winged ants, and airborne spiders during flight. | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| จำนวนไข่ | -- | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Pale-rumped Swift
Breathy, rippling chatter with airy quality; light twittering notes loosely strung together in relaxed arrhythmic sequences.
Great Dusky Swift
Loud, churring trill; harsher and louder than other Cypseloides; calls over Iguacu Falls and major Neotropical waterfalls; buzzy 'bzzzt-bzzzt' in aerial groups
Geographic Range & Migration
Pale-rumped Swift
Found in the western Amazon basin from eastern Peru and Bolivia east to central Brazil. Resident in lowland tropical forest near rivers.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
สถานะการอนุรักษ์
Pale-rumped Swift
Great Dusky Swift
How to Tell Them Apart
Pale-rumped Swift
Small; dark sooty-brown upperparts; distinctively very pale whitish rump strongly contrasting with dark back; underparts dark grey-brown; short spiny tail; Amazonian species with one of the most striking white rumps …
Great Dusky Swift
Very large; entirely dark sooty-brown with pale grey forehead and chin scaling; slightly paler underparts; broad wings; largest Cypseloides swift; South American waterfall specialist with dusky uniform plumage and imposing …
About These Birds
Pale-rumped Swift
A small swift (11-12 cm) of humid lowland forests from Colombia to Peru and western Brazil. Dark plumage with a conspicuous pale rump band. Spine-tipped tail. Aerial insectivore, foraging over forest canopy and rivers. Often seen in mixed-species swift flocks.
Great Dusky Swift
A large swift (18-20 cm) of southeastern Brazil, eastern Paraguay, and northeastern Argentina. Dark sooty-brown plumage. Aerial insectivore, foraging over forested gorges and waterfalls. Nests in large colonies behind waterfalls. The largest member of the genus Cypseloides.