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In a message dated 95-11-30 17:42:13 EST, ornstn@inforamp.net (Ronald
Orenstein) writes:

>Even highly-evolved living gliders (which, as I have argued elsewhere on
>this list, may not have anything to do with the origin of flight) often use
>their gliding ability simply to get about, not just to flee predators; I
>have seen this myself in Draco lizards and giant flying squirrels in Borneo.

Once flight has evolved, it can be put to all sorts of uses. We really should
separate proximate causes from opportunistic functions. (Or whatever.)