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Re: Third claw for climbing was Re Pro(to)avis
maybe the small prey wasn't used to that sort of a predator...
Either it would have become very soon... or it would have become extinct, so
that the predator would have had to change its methods.
did Protoavis live near areas that may've been former
islands (that re-connected to the mainland) ?
You're confusing *Protoavis* (all parts of which -- a drepanosaurid, a
coelophysid, and who knows what else), which lived in Texas ( = western
central Pangaea... unlikely place for an island) with "Proavis" (which is a
purely hypothetical concept... well, lots of such concepts).
I prefer separate explanations. Wings for brooding, then exapted for...
who knows... WAIR or maybe even swimming or...
what's WAIR ? *curious*
Search the archives. http://dml.cmnh.org "Wing-assisted inclined running" --
some birds do that to run up steep inclines. They use their wings to stay
close to the substrate -- but not to generate lift.