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Re: FW: The ground-nowhere hypothesis on the origin of bird flight (joke)
On Tue, Oct 13th, 2009 at 7:37 AM, dale mcinnes <email@example.com> wrote:
> The birds I mentioned do pounce from trees. Sure. Their hunting
> range has greatly expanded because of their highly evolved modern
> capabilities. They can also fly after their prey.
> Any proavis as you would point out would have a fraction of that=20
> range but doesn't make it any less viable.
It would seem to me that the primary use for wings (in extant avians anyway) is
to *slow* the rate
at which the creature plumets to the ground, or to actively reverse the
direction of travel and move
upwards against gravity.
I'd think any creature that dropped on it's victims from any decent height
would want to be moving
as fast as possible, and not be slowed in their descent. If a light-weight such
as Archie was
to 'gently' flutter/glide down onto it's prey, not only would the prey have
plenty of time to move out
of the way, but the resulting impact of said light-weight moving at a reduced
speed would be like
trying to beat someone to death with a feather pillow (fun, but ultimately
Pouncing onto prey cat- or fox-style (with a near-vertical leap) only works if
you hit hard and fast.
GIS / Archaeologist Australian Dinosaurs
Melbourne, Australia http://home.alphalink.com.au/~dannj