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re: the bipedal ptero-challenge
Ronald I. Orenstein wrote :
Well, have a look at a sparrow sometime. Many birds (indeed most) can take off
directly from a standing or perched position, with no running necessary. of
course this starts with a bipedal STANCE, but that is not the same thing as
I'm not arguing against such evidence. I'm not at perched pterosaurs, I was
merely stating that, if tracks there are, so the trackmakers must have taken
off one way or another. I should have precised my thinking : it might be easy
for light fliers, but if you look at some seagulls or albatroses, they do run
while flapping their wings before taking off. I still can't imagine
*Quetzalcoatlus*, *Ornithocheirus* or *Pteranodon* just take off without a bit
of running (These are big ones but I'm sure it must be true for some
middle-sized pterosaurs). This, in my mind, still doesn't make them bipedal.
Just a help for take-off operations.