Argentavis magnificens (literally "Magnificent Silver Bird") is the largest flying bird ever discovered.
Sometimes called the Giant Teratorn, is an extinct species known from (as of 2006) three sites from the late Miocene (12-5 million years before present) of Central and Northwestern Argentina, South America, where a good sample of fossils has been obtained.
Physical characteristics
Currently accepted estimates:
* Wingspan: 5.7 to 8.3 m (19 - 28 ft)
* Wing area: nearly 7 square m (75 square ft)
* Wing loading: c. 11,5 kg/square m
* Length: 3.5 m
* Height: 1.8 to 2 m
* Weight: 65-100 kg
Argentavis - Wikipedia, the free encyclopedia
http://i52.photobucket.com/albums/g6/redstart/teratorn.jpg
http://www.esencia21.com/CRIPTO/Aves2/thunderbird-argentavis-draw.jpg