![Great Dusky Swifts (Cypseloides senex) perched on cliff in front of waterfall, Iguazu National Park, Argentina, October Stock Photo - Alamy Great Dusky Swifts (Cypseloides senex) perched on cliff in front of waterfall, Iguazu National Park, Argentina, October Stock Photo - Alamy](https://c8.alamy.com/comp/W7NXW7/great-dusky-swifts-cypseloides-senex-perched-on-cliff-in-front-of-waterfall-iguazu-national-park-argentina-october-W7NXW7.jpg)
Great Dusky Swifts (Cypseloides senex) perched on cliff in front of waterfall, Iguazu National Park, Argentina, October Stock Photo - Alamy
![The great dusky swift is a species of swift in the Apodidae family. It is found in Argentina, Bolivia, Brazil, and Paraguay. | Swift, Paraguay, Species The great dusky swift is a species of swift in the Apodidae family. It is found in Argentina, Bolivia, Brazil, and Paraguay. | Swift, Paraguay, Species](https://i.pinimg.com/originals/c9/ba/89/c9ba8939c2385c8f0e04efdafcd10dc3.jpg)
The great dusky swift is a species of swift in the Apodidae family. It is found in Argentina, Bolivia, Brazil, and Paraguay. | Swift, Paraguay, Species
Birds - Great Dusky Swift (Cypseloides senex) in Brazil by Frodoaldo Budke. This swift is well-known to birders for flying around the incredible torrents of Iguazu Falls. They rest behind the waterfalls
![Great Dusky Swift (Cypseloides senex) adult, in flight, landing at waterfall, Iguazu N.P., Misiones, Argentina, november Stock Photo - Alamy Great Dusky Swift (Cypseloides senex) adult, in flight, landing at waterfall, Iguazu N.P., Misiones, Argentina, november Stock Photo - Alamy](https://c8.alamy.com/comp/CNJ3GD/great-dusky-swift-cypseloides-senex-adult-in-flight-landing-at-waterfall-CNJ3GD.jpg)
Great Dusky Swift (Cypseloides senex) adult, in flight, landing at waterfall, Iguazu N.P., Misiones, Argentina, november Stock Photo - Alamy
![Great Dusky Swift (Cypseloides senex) perched in front of waterfall, Iguazu National Park, Argentina, October 2008 Stock Photo - Alamy Great Dusky Swift (Cypseloides senex) perched in front of waterfall, Iguazu National Park, Argentina, October 2008 Stock Photo - Alamy](https://c8.alamy.com/comp/W7NXW1/great-dusky-swift-cypseloides-senex-perched-in-front-of-waterfall-iguazu-national-park-argentina-october-2008-W7NXW1.jpg)
Great Dusky Swift (Cypseloides senex) perched in front of waterfall, Iguazu National Park, Argentina, October 2008 Stock Photo - Alamy
Birds - Great Dusky Swift (Cypseloides senex) in Brazil by Frodoaldo Budke. This swift is well-known to birders for flying around the incredible torrents of Iguazu Falls. They rest behind the waterfalls
![Great dusky swift (Cypseloides senex), a tiny bird that nests behind massive waterfalls in Brazil : r/AIDKE Great dusky swift (Cypseloides senex), a tiny bird that nests behind massive waterfalls in Brazil : r/AIDKE](https://i.redd.it/p676qy0bt2e71.jpg)