Avoid bats like a moth

[Wayne Harrison]

Current understanding of the co-evolution of bats and moths has been thrown into question following new research.

It sounds like an arms race between the two:

http://www.scenta.co.uk/scenta/news.cfm?cit_id=1373746&FAArea1=widgets.content_view_1

[Ralph E. Powers]

So basically as I read the article... eventually bats will evolve to change their ultrasound cries to a different pitch/frequency to counter the moth's evolutionary change in detecting their typical predators.
But also as I understand it some bats can "slam" a moth with a stunning pitch cry temporarily screwing up the moth long enough to catch it. Dolphins have been known to do this to certian prey fish of theirs and I recall reading Sperm whales will stun squid in the same manner.

Interesting reading .... for those interested.