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Re: pterosaur femora sprawl

Nor do I.

----- Original Message ----- From: "ptnorton" <ptnorton@suscom-maine.net>
To: <twilliams_alpha@hotmail.com>; <dinosaur@usc.edu>
Sent: Monday, June 02, 2008 7:31 PM
Subject: Re: pterosaur femora sprawl

If there was an arboreal stage in the origin of avian flight, which is an open question, I don't see a compelling argument for the necessity of either a quadrupedal climbing or a four-limb gliding phase.