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Re: Greg Paul is right (again); or "Archie's not a birdy"
On Thu, Jul 28th, 2011 at 10:17 AM, Tim Williams <firstname.lastname@example.org> wrote:
> Coincidentally, among mammals aerial gliding has evolved exclusively
> in herbivores.
The earliest bat fossils appear to be insectivores though. Perhaps when
predators develop flight,
they jump straight to active flight and forgo a passive gliding phase? Or at
the very least, any
passive gliding stage might be shortened (geologically speaking) by intense
selective pressure to
retain the ability to persue prey (which I would imagine parachuting membranes
greatly). It might explain why the earliest pterosaur and bat fossils already
have 'advanced' flight adaptations.
Spatial Data Analyst Australian Dinosaurs
Melbourne, Australia http://home.alphalink.com.au/~dannj