[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Ornithoms, Parrots, and others

In a message dated 11/12/98 8:44:18 AM EST, th81@umail.umd.edu writes:

<<  A large radiation of
 small, tree-climbing non-avian coelurosaurs is fully compatible with the
 standard model. >>

But it isn't compatible with the "ground up" cursorial scenario of the origin
of flight. In the "ground up" scenario, birds evolve flight as ground-dwelling
animals by accumulating the anatomical features associated with flight for
non-flight reasons. They become arboreal only >after< flying makes trees
accessible. If the standard model admits tree-climbing non-avian coelurians,
then it is virtually indistinguishable from BCF, and I can get off my soapbox.