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Re: bauplan convergence
I'm not positive but I think ibises do the hoppy flappy wing thing.
Many birds such as grouse and chickens and so on do an out-streatched
wing shuffleing dance thing to attract the babes. Cranes do that
holding back the head and spreading the wings thing as a courtship
Wings are a major portion of MANY bird mating displays. It seems
likel;y that's what proto-feathered owings were for before flight. And
the hoppy flappy thing seems most likley to introduce launch situations
to such animals.
I'd forgotten who suggested this onlist, but I didn't originate the
idea. It just makes a hell of a lot of sense to me.
Martin Human wrote:
> From: Betty Cunningham wrote
> I still put a vote behind the protofeather sexual display hopping thing
> for wing development; which is niether trees up or trees down, really.
> It makes more evolutionary sense to have a pre-flight-capable wing for
> making pretty, that later develops flight-worthiness, than a post-flight
> flipper developing flight-worthiness does...
> >I have visions of those (I think) Capercailles(?) which leap up from the
> ground and flash their wings in display....is that what you have in mind?
> cheers, m
Flying Goat Graphics
(Society of Vertebrate Paleontology member)