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"Birds Again"--R.J.Meyers

Okay, forgive my ignorance on Archaeopterix specifics, but are these fossils 
widely distributed or are they fairly geographically localized.  I can 
imagine organisms developing flight being subjected to selective pressures of 
terrain, climate, topography and whatnot.  Any speculations of habitat?  
(e.g., forest vs. plain vs. hills).  Seems to me flight-related behaviors 
such as mechanics of take off (missile vs. airliner) would have to take into 
account environment.  Of course I'm not a paleontologist, just a self-
proclaimed (although timidly) evolutionary behaviorist.