Researchers have revealed more detail about the evolutionary "arms race" between bats and moths. One study in the journal Current Biology has shown how a species of bat uses a quiet "stealth mode" of the clicks it uses to locate its prey. Another from a Royal Society journal showed that a moth can distinguish between clicks that mean it has been spotted, and clicks that mean a strike. This allows the moths to choose when to spend energy on defensive measures.
moth bat echolocation evolution sound navigation defense