MICE SING.

So apparently a wider variety of animals than we might expect actually sing what can technically be termed songs. (Songs are longer than cries, contain a lot more syllables, and happen regularly.) The most surprising one for me, as per that article linked to in brackets there, is MICE.

Yup, you read that right: Mice. Sing.

More specifically, male mice sing in order to find mates, and they do it at ultrasonic frequencies – too high for human hearing.

Of course, if you have fancy technology,...