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Re: pterosaurs, bats, flying theropods



John Bois wrote:

> After all, feathered wings are likely not identical in effectiveness as
> non-feathered wings.  Which are better?

Depends upon what they are doing at the time.  This is somewhat
analogous to asking which is the better mode of transportation, a car or
a boat.  Sort of depends upon whether your goal is to travel on a
highway or a river.

For soaring, they are roughly the same.  For low frequency flapping, the
membranes will likely win hands down, at least in pterosaurs.  For high
frequency flapping, the feathers will likely perform better, but these
are all extreme overgeneralizations.
Best wishes for the holiday season,
Jim