Giraffes Hum to Each Other Throughout the Night, And Zookeepers Never Noticed
By Allison Eck
Until now, giraffe caretakers had reason to believe that their
long-necked vegetarian friends were strictly silent beings. A
13-foot-long trachea isn’t exactly conducive to easy vocalization.
Scientists assumed that, if anything, giraffes—like elephants—might
produce infrasonic (ultra-low) sounds below the range of human hearing.
But without the data to back it up, researchers couldn’t guarantee that
giraffes weren’t simply producing audible noises out of human earshot.
So a team at the University of Vienna painstakingly gathered 947 hours
of giraffe noises over an eight-year period at three European zoos and
measured their spectral characteristics, with the goal of finding out
once-and-for-all whether giraffes’ socially-structured society lends
itself to vocal communication.
What they found was that at night, the giraffes produced a harmonic and
sustained “humming” that varied in frequency over time. Not only were
they humming, but these vocalizations were within the frequency range
that humans can hear (albeit on the low side, at an average of 92
Read more: NOVA – PBS
photograph by Tambako the Jaguar | Flickr CC
We’re learning so much just as they’re going extinct
sigh I swear, just put one freaking autistic person anywhere near an animal which is debatably silent and you will find out WITHIN AN HOUR what kind of noises that animal makes I just
like I could tell when my caterpillars were active because I could hear them eating and pooping
December 19, 2018