Have you ever wondered how a giraffe sleeps?
The tallest living land animal doesn't sleep as long as other mammals, but they certainly find a weird way of getting comfortable.
One study from the University of Zurich found that giraffes also sleep standing up, and the peculiar sleep position seen below isn't that common. Adult giraffes, the researchers found, assume this position for less then five percent of the average 4.6 hours they sleep each day.
(Photos posted by user arbili.)
Giraffes (Giraffa camelopardalis) are classified as "least concern" by the International Union for Conservation of Nature, but two subspecies of giraffe are both classified as endangered. It has been estimated that there are fewer than 200 Rothschild's giraffes in the wild.
Habitat degradation, poaching and armed conflicts in East Africa are some of the biggest threats to giraffes, according to IUCN.