Watch Black History and Culture Videos all year long ➜
Get smart curated videos delivered to your inbox.   SUBSCRIBE
The Kid Should See This

The koala’s deep voice

Watch more with these video collections:

Body mass and vocal pitch don’t always match. Male koalas have deep, rumbling vocalizations, an unexpectedly low sound that might normally be associated with wild boars or a huge braying beast the size of an elephant instead of a small herbivore. And now we know why…

In a study published in the journal Current Biologyscientists describe a second, much larger pair of vocal folds located outside of the larynx that creates the unique mating soundFrom National Geographic (which has a great “animal body mass to vocal pitch” chart)

Koala bellows have a pitch about 20 times lower than they should be given the animals’ size… Male koala bellows, for instance, are so fearsome that sound designers used recordings of them to create the T. rex roars in the movie Jurassic Park…

Study co-author Benjamin Charlton, of the University of Sussex in the U.K., explained in a statement that during inhalation, koala bellows sound like snoring, and during exhalation, they sound more like belching.

The updated video above is of Tekin, a koala male at the Dallas Zoo. He’s in a “bellowing contest with neighboring male koala, Gummy.”

In the archives: more koala videos.

This Webby award-winning video collection exists to help teachers, librarians, and families spark kid wonder and curiosity. TKSST features smarter, more meaningful content than what's usually served up by YouTube's algorithms, and amplifies the creators who make that content.

Curated, kid-friendly, independently-published. Support this mission by becoming a sustaining member today.

🌈 Watch these videos next...

Yabbra the koala runs down a hallway

Rion Nakaya

Why Do These Monkeys Have Such Outrageous Noses?

Rion Nakaya

Why do baby koalas eat their mothers’ poop?

Rion Nakaya

What does a baby rhino sound like?

Rion Nakaya

What do baby sloths sound like?

Rion Nakaya

Up close with a Giant Galapagos Tortoise

Rion Nakaya

The mysterious song of the Humpback Whale

Rion Nakaya

Sounds of Survival: The quest to record an exquisite spike-thumb frog mating call

Rion Nakaya

Nine animal sounds and Super Mario World sound effects created with a violin

Rion Nakaya