MargenWhile you need seven or eight hours, a giraffe manages with a fraction of that.
It sleeps in snatches, often standing up and with one eye almost on the lookout, in naps of just a few minutes. Truly deep sleep takes up only moments of its day, often bending its long neck backwards to rest its head.
On the savannah, sleeping a lot is a dangerous luxury: whoever lowers their guard for too long ends up as dinner.