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Re: bauplan convergence



At 09:14 AM 6/18/00 -0700, Betty Cunningham wrote:
>Leaping about in trees with a symmetrical drag mechanism (feathers or
>membranes) leads to gliding.  
>
>However gliders don't flap.  Cats, squirrels, lemurs, monkeys, lizards,
>snakes, and frogs don't flap either.

But gliding provides a state where flapping can become advantageous.
Although gliders don't flap, at least the flying squirrel will manipulate
its membrane to control its direction of glide and to slow down.  This
action, IMHO, will lead to flapping over enough time.  

-Randy