[xJones]

Now they claim, "Prominent muscle attachment sites on the arm, shoulder and chest bones show that pterosaurs were active 'flappers.'"

The flapping must have stirred up quite a wind, as the wingspan of some large species, such as the pterodactyl, could reach 36 to 39 feet.

"How American West Got It's Start..."

[StriperSniper]

Now they claim, "Prominent muscle attachment sites on the arm, shoulder and chest bones show that pterosaurs were active 'flappers.'"

I can see that.