Some bats sing love songs.

Anyone who’s ever serenaded their sweetheart has more in common with bats than they might think. In 2009, researchers at the University of Texas at Austin and Texas A&M studied the vocalizations of Tadarida brasiliensis — the Brazilian free-tailed bat, more commonly known as the Mexican free-tailed bat — and found the tunes to be surprisingly nuanced love songs. Though difficult for humans to hear, the songs consist of unique syllables that combine to form three types of “phrases”: chirps, buzzes, and trills. The males combine these phrases in different ways to attract females — and to warn other males to stay away.

Bats are blind.

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Despite the expression, bats can see just fine. While it’s true that most species use echolocation to hunt in the dark and thus rely more on sound than sight, some fruit bats don’t echolocate at all and certain species can even see UV light.

What makes this especially remarkable is that, until recently, bats weren’t thought to communicate with one another in such a structured way. But when the researchers listened to recordings of two free-tailed colonies in Austin and College Station, Texas, they discovered that they “use the same ‘words’ in their love phrases,” according to lead researcher Kirsten Bohn. And we’re learning more about bat communication all the time — in August 2021, researchers found that baby bats “babble” much like human infants do, practicing syllables over and over until they learn to get it right.

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