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Re: 'bird' definitions

In a message dated 3/22/99 6:59:42 AM EST, sagitta_elegans@yahoo.com writes:

<< Primitive?  If Triceratops is descended from a small volant reptile,
 it is a lot more derived than Archaeopteryx, or even modern birds. >>

Volant probably not very, but arboreal quite likely. We're talking about more
than 150 million years of evolution between Triceratops and its arboreal
ancestor, so there is indeed quite a bit of room for evolution.