Bats have an uncanny ability to track and eat insects on the fly with incredible accuracy. But some moths make these agile mammals miss their mark. Tiger moths (left), for example, emit ultrasonic clicks that jam bat radar. Now, scientists have shown that hawk moths (right) and other species have also evolved this behavior. The nocturnal insects - which are toxic to bats - issue an ultrasonic "warning" whenever a bat is near. After a few nibbles, the bat learns to avoid the noxious species altogether. Interestingly, the sound-producing apparatus is typically located at the tip of the moth's genitals. ...