Australia’s koalas owe their constant drowsiness to their poor diet. They depend upon eucalyptus leaves for survival. As a result, they stay awake briefly for four to five hours.
Sloths, often associated with laziness, can sleep up to 20 hours in captivity. While wild sloths rest for about 10 hours.
Bats are nocturnal, but even at night, they are not highly active, returning to sleep after a few hours of hunting.
Opossums are known for their unique defence mechanism, but often, a seemingly lifeless opossum is simply fast asleep.
Pythons are among the least active snakes, sleeping for up to 18 hours at a time. These nocturnal hunters can spend days or weeks digesting a single meal.
Giant armadillos have a protective carapace, but they still prefer to stay hidden rather than rely solely on their armour, digging burrows where they spend 16 to 18 hours at a time.