Great Dusky Swift vs White-throated Needletail
Cypseloides senex مقارنةً بـ Hirundapus caudacutus
Side-by-Side Comparison
| السمة | Great Dusky Swift | White-throated Needletail |
|---|---|---|
| الاسم العلمي | Cypseloides senex | Hirundapus caudacutus |
| الرتبة | Caprimulgiformes | Caprimulgiformes |
| الفصيلة | Apodidae | Apodidae |
| حالة الحفاظ | Least Concern | Least Concern |
| الطول | — | — |
| طول الجناح | 33,8 cm (13.3 in) | 41,2 cm (16.2 in) |
| الوزن | 83,0 g (2.93 oz) | 101,475 g (3.58 oz) |
| النظام الغذائي | Feeds on aerial plankton of tiny insects and spiders; entire diet captured during non-stop aerial … | High-speed aerial insectivore catching small flying insects and aerial spiders during fast sustained flight. |
| عدد البيض في الوضع | 1-2 | 2-7 |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
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
White-throated Needletail
Powerful, loud churring rattle descending in pitch; deep resonant trill audible from great distance, forceful and sustained.
Geographic Range & Migration
Great Dusky Swift
Found in eastern South America from Venezuela and the Guianas south to Bolivia and Paraguay. Resident near rocky cliffs and waterfalls.
White-throated Needletail
Breeds in Siberia, China, Japan, and the Himalayas. Long-distance migrant wintering in Australasia and Southeast Asia. Breeds in forests and cliffs.
حالة الحفاظ
Great Dusky Swift
White-throated Needletail
How to Tell Them Apart
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 …
White-throated Needletail
Large; dark blackish-brown upperparts with metallic green gloss; white throat and undertail coverts; pale white back saddle between wings; short spiny tail; one of the world's fastest birds; white throat …
About These Birds
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.
White-throated Needletail
A large needletail swift (19-20 cm, wingspan 50-55 cm) with powerful, rapid flight. Dark brown plumage with a white throat and undertail. Spine-tipped tail. Breeds in forests of eastern Asia from Siberia to Australia. One of the fastest flying birds, reaching speeds over 160 km/h.