Big Bird.


The prehistoric South American bird Argentavis magnificens had a wingspan of 23 feet! That makes this bird about the same size as a Cessna light aircraft. Scientists think Argentavis was too big and heavy to flap its wings, but could fly by taking advantage of thermals and updrafts. http://dsc.discovery.com/news/2007/07/02/bigbird_ani.html?category=animals&guid=20070702170030

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