on Animal Planet.. just a short bit on it.. Predator's
Prey...
now they're showing the moth and bat...
the moth and bat are in an arms race... so far, some moths have
developed a ear thingy which allow them to figure out that a bat is
stalking them...
the moth is cool... just before the bat reaches it and strikes, it
dodges and falls out of the reach of the bat...
then now, long-eared bats do not use their sonar and just listens
to the wingbeats of the moth to catch them!
an arms race! 
