"Most people are familiar with the telltale squeak of a mouse scurrying out of their pantry, but scientists have long known that these aren’t the only noises house mice make. During courtship, the rodents also communicate in the ultrasonic frequency range, which sits beyond human hearing. Now, new research shows that these mating vocalizations are more than just your typical squeaks — they’re songs, not unlike those you’d expect to hear from courting birds."