http://www.ucmp.berkeley.edu/diapsids/pterosauria.html:
Ranging from the size of a sparrow to the size of an airplane, the pterosaurs (Greek for "wing lizards") ruled the skies in the Jurassic and Cretaceous, and included the largest vertebrate ever known to fly: the late Cretaceous Quetzalcoatlus.
© Jed Lewison