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RE: New refs
James Cunningham wrote:
> > and that bird flight therefore evolved from the ground up.
> Could it have been a mixed bag, with birds getting better at several
> options at about the same time, as their mechanical ability improved?
Excellent point, Jim. The traditional arboreal/"trees-down" versus
cursorial/"ground-up" polarization is counterproductive. One of the things
that is coming through in many recent publications is that these two
scenarios are NOT necessarily mutually exclusive when it comes to the
evolution of avian flight.