Tiger moths jam the sonar of bats

Bats view the world in echoes, timing the reflections of their own ultrasonic calls to navigate and hunt. This biological sonar, or echolocation, has made them masters of the night sky; it's so sensitive that some species take moths and other insects on the wing, while others pluck spiders from their webswithout entangling themselves in silk. But with such an efficient technology, it was only a matter of time before their quarry developed countermeasures.