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Re: four winged Archaeopteryx



On 10/8/06, Tim Williams <twilliams_alpha@hotmail.com> wrote:

I don't think it's at all off the mark.  Neornithean birds, as far as it is
known, show no evidence of losing their feathery body covering through
natural selection.  But things may have been different for their non-avian
cousins, back in the Mesozoic.  It is impossible to frame an evolutionary
scenario that explains the distribution of feathers in non-avian Theropoda
without invoking either multiple losses or multiple gains of feathers for at
least part of the body.

Wouldn't the naked faces of vultures be an instance of partial feather loss within Neornithes?

--
Andreas Johansson

Why can't you be a non-conformist just like everybody else?