Nay
28-05-2007, 11:27 PM
They sing for their potential mates. You just can't hear it.
But this article also has sound files with a lowered pitch. They sound a bit like birds:
http://www.guardian.co.uk/science/story/0,3605,1605806,00.html
But this article also has sound files with a lowered pitch. They sound a bit like birds:
http://www.guardian.co.uk/science/story/0,3605,1605806,00.html