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>Ooh. I really have no idea. I think that they probably stood around
>on two legs, and could sort of waddle walk. If they needed to go
>faster on the ground, they could use their hands. I am not sure why
>some such as Padian, claim that Pterosaurs were capable of running
>bipedally on the ground; hey, why run away when you can fly away?
I think they would have ran. Even modern birds will run rather than fly. If
you watch them they only fly as a last resort. Why? Because running takes
less energy than flying. So I think the "ancient" birds and pterasaurs
(especially small ones) would have run.