Beware of Muslims!!! Sleep like a duck!!

VARIATION IN TOTAL SLEEP TIME IN MAMMALS

Mammal Total Daily Sleep Time (in hours)
Giraffe 1.9
Roe deer 3.09
Asiatic elephant 3.1
Pilot whale 5.3
Human 8.0
Baboon 9.4
Domestic cat 12.5
Laboratory rat 13.0
Lion 13.5
Bats 19.9

VARIATION IN SLEEP STYLE/ POSTURE/TIME OF DAY

Humans Sleep in night, wake in the day (diurnal)
Mice Sleep in day, wake at night (noctournal)
Some rodents and insects Sleep in night and day, wake at dawn and dusk (crepuscular)
Moles/rabbits Sleep in burrows
Zebras Sleep in the open
Cows Sleep with eyes open
Horses Sleep standing
Leopards Sleep on tree limb
Bats Sleep upside down
Seals/ Hippos Sleep underwater (part of the time)
Dolphins/porpoises Sleep with one half of the brain at a time to allow breathing while swimming/sleeping
Ducks/pidgeons Sleep with one half of the brain while keeping one eye on predators
Migratory birds Sleep while flying across the ocean
Fruit flies/some fish Sleep-like rest periods with decreased movement, and altered threshold for stimuli.