Bats make ultrasonic noises, which means they're often too high-pitched for humans to hear. But thanks to a clever trio of musicians and bat fans, we can not only hear what bats sound like in the dark of night — we can also hear them sing an ode to the Dark Knight himself.

The video below is a cover of Neal Hefti's theme song for the 1960s "Batman" TV series, but instead of "na na na na" it uses the high-frequency clicks and chirps of actual bats. Its composers took recordings of ultrasounds made by wild bats, digitally modified them to be audible, and then assigned them to specific keys on a keyboard. Here's the result:

The brains behind this batty tribute are Ulrich Seidel, Sándor Seuntjens and Wolter Seuntjens, a group of German and Belgian artists. Seidel is credited with arranging the music, while Sándor Seuntjen compiled the video clips and Wolter Seuntjens conceived the idea.

Now that bats have finally been able to articulate their appreciation for Batman, maybe he can return the favor and do something about white-nose syndrome?

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