Science Says This Is the Sound Giraffes Make - TIME

It’s long been assumed that unlike other animals, giraffes are largely silent beasts. They don’t oink, moo or roar. But new research suggests perhaps giraffes do have a distinct sound: They hum.

It was previously believed that giraffes may make sounds that are impossible for humans to hear, similar to elephants, but the new research suggests otherwise. In a new study published in the journal BioMed Central, researchers recorded over 940 hours of sounds from giraffes at three zoos over an eight-year period. Beyond the occasional snort or grunt, the researchers recorded humming sounds that the giraffes made only at night. The humming was 92Hz in frequency, Wired reports, which is still audible to humans but pretty low.

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