The Darwin’s rhea is a massive, flightless bird that can run up to 37 miles per hour. Known as ñandús in Chile and choiques in Argentina, the long-necked, ostrich-like birds are common ...

Wing bones are greatly reduced in ostrich and rhea and completely absent in moa. Ostrich, rhea and moa also have sternums with no keel, a hallmark of flightless birds.  Advanced Search ...