Giraffes aren't known for their vocalizations, a limitation thought to
be caused by their long necks, but biologists have know determined that
they do "hum" at night. According to cognitive biologist Angela Stöger
at the University of Vienna, the animals produce a low frequency hum
with "a complex acoustic structure." Hear it below!
"It could be passively produced – like snoring – or produced during a
dream-like state – like humans talking or dogs barking in their sleep,”
Stöger told
New Scientist.
Stöger adds that the hum could also be how giraffes communicate with each other when it's too dark to see.
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