 Then clicking moths were dropped more frequently than mute moths.In a set of experiments using bats that had never been exposed to moths before, Hristov and Conner found the clicking signals helped the bats to learn which moths are distasteful, and so to avoid them.They did not rule out a jamming function for the calls, however, and Ratcliffe and Fullard noted 20% of these native bats aborted attacks on the moth.