The dating game can be deadly for some frogs. Túngara male frogs fill the nighttime world at their shallow ponds in Central America with croaky love songs, but their serenades sometimes attract a predator instead of a lover.Hunting bats pick up on the lusty calls and zero in on dinner, according to research published in Science yesterday. The flying mammals not only hear these tiny amphibians’ songs, but they also detect the ripples created by the noise on the surface of the water.The Túngara frog’s desire doesn’t necessarily blind him to the threat. When he senses a bat flying overhead—as the frogs often do—he immediately cuts the music. Unfortunately, this doesn’t guarantee his safety. For several seconds after the song has died the ripples created by frog’s vocal sac inflating and deflating continue to spread; the bats sense the movement by echolocation, enabling them to hone in on lover boy.Lead researcher Wouter Halfwerk of Leiden University first wondered if the...