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Old 05-20-2009, 12:32 AM
Blake Blake is offline
Join Date: Mar 2001
Posts: 11,049
Originally Posted by Nametag View Post
Echolocation? Sonar?
Those are the same thing (well tehcnically one is a subset of the other).

And you can't evolve echolocation ex nihilo. You need to be have an elaborate means of producing sound and elaborate means of recieving sound already in place before you can evolve echolocation.

And you don't evolve elaborate means of producing sound if you aren't using it to communicate. Even if the only purpose is to convey a threat to a predator, that's still commnication, albeit intraspecies.

I can't see any posible reason to develop sophisticated sound producing systems except to communicate your intentions or position ot other organisms.