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Re: Origin of flight in birds and bats



On Sun, Nov 13, 2011 at 5:48 PM, Dann Pigdon <dannj@alphalink.com.au> wrote:
>
> Wouldn't that suggest that frugivorous megabats, with good eyesight and no 
> echolocation, evolved
> from insectivorous cave-dwelling microbats with (presumably) small eyes and 
> echolocatory
> abilities? Surely that would require a lot of reversals in the megabats - 
> unless flapping flight
> evolved twice in bats.

Why couldn't the flightless stem-bats have been arboreal rather than
cave-dwelling? Dropping is presumably similar in both cases.
-- 
T. Michael Keesey
http://tmkeesey.net/