Argentavis magnificens
Argentavis magnificens (literally "magnificent Argentine bird") was a large bird of prey that lived during the late Miocene epoch of the Neogene period about 6 million years ago.
Argentavis is the largest known flying bird ever. Its wingspan was about 8m (24 ft) and it was 3.5 m (11.5 ft) long. It was probably less aerodynamically suited for predation than its relatives. It probably preferred to scavenge for carrion.