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Re: Feather Flap

----- Original Message -----
From: "Tim Williams" <twilliams_alpha@hotmail.com>
Sent: Tuesday, June 05, 2007 2:20 AM

I'm not sure this holds for the first gliding theropods, who may have
evolved gliding ability as means of getting from trees to the ground.

That would be parachuting, not gliding, which has to some extent opposite aerodynamic requirements.

but I don't see any reason to assume that you have to be specialized
for arboreality in order to be an effective glider.

No, but if you're not already arboreal, what point is there in gliding?

This is not true for all arboreal gliders. Some gliding amphibians have flaps on the distal limbs, such as "flying frogs" (_Rhacophorus_ spp.) which have huge webbed feet for gliding.


The "flying geckoes" (_Ptychozoon_ spp.)
have gliding surfaces on the abdomen and feet that are not confluent.

Parachuting again.