Estimates suggest that Argentavis had a wingspan of up to 7 meters (23 feet) and weighed around 70 kilograms (154 pounds) —making it the largest flying bird to ever exist.

Scientists have identified bones of the largest flying bird ever found -- an ancient soaring seabird with a wing span of at least 21 feet. Daniel Ksepka, curator of science at the Bruce Museum ...

There’s been a lot of lip flapping going on during the past month or so about Big Bird’s owner, Sesame Workshop.