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In a message dated 95-12-02 15:58:29 EST, ornstn@inforamp.net (Ronald
Orenstein) writes:

>No. Birds DO have a patagium, divided into a metapatagium and a propatagium.
>According to the article "Wing" in "A Dictionary of birds" [Campbell and
>Lack, eds):
>"The propatagium is a membranous fold of skin along the anterior margin of
>the wing, from shoulder to carpal joint; it contains flexor muscles and
>tendons.  The metapatagium is  a similar fold between the body and the
>posterior margin of the upper wing."

As I noted earlier, I was focusing on the expansive patagia of bats and
pterosaurs, not those little flaps of skin in bird wings. But yes, they are
indeed patagia, and of course questions now arise concerning their utility,
functions, and possible evolution.