Andean condors are massive birds, among the largest in the world that are able to fly. Because they are so heavy (up to 33 pounds), even their enormous 10-foot wingspan needs some help to keep ...

The Andean condor is the world's heaviest soaring bird and can weigh up to 15kg The world's heaviest soaring bird flaps its wings just 1% of the time during flight, researchers have found.