Glossy Swiftlet vs Great Dusky Swift
Collocalia esculenta в сравнении с Cypseloides senex
Side-by-Side Comparison
| Характеристика | Glossy Swiftlet | Great Dusky Swift |
|---|---|---|
| Научное название | Collocalia esculenta | Cypseloides senex |
| Отряд | Caprimulgiformes | Caprimulgiformes |
| Семейство | Apodidae | Apodidae |
| Охранный статус | Least Concern | Least Concern |
| Длина | — | — |
| Размах крыльев | 19,9 cm (7.8 in) | 33,8 cm (13.3 in) |
| Масса | 8,66 g (0.31 oz) | 83,0 g (2.93 oz) |
| Питание | Feeds on aerial plankton including tiny flies and spiders; forages in large noisy flocks above … | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … |
| Размер кладки | 1-2 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Glossy Swiftlet
Rapid, high-pitched twittering; thin 'tsit-tsit-tsit' in flight; echolocation clicks audible in cave roosts; very common; calls over forest and open areas; colonial and noisy
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
Glossy Swiftlet
Found from India and Sri Lanka through Southeast Asia to New Guinea, Australia, and Pacific islands. One of the most widespread swiftlets.
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
Охранный статус
Glossy Swiftlet
Great Dusky Swift
How to Tell Them Apart
Glossy Swiftlet
Tiny; brilliant blue-green glossy upperparts; contrasting white rump patch; white underparts; deeply forked tail; widespread Indo-Pacific species and one of the most colourful swiftlets with a striking tricolour of gloss, …
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
Glossy Swiftlet
A small swiftlet (9-10 cm) widespread from the Malay Peninsula through Indonesia to the Pacific islands. Glossy blue-black upperparts with whitish or grey underparts. Aerial insectivore, foraging in flocks over forest and open country. Colonial nester in caves and under rock overhangs.
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.