Cats spend almost two thirds of their lives sleeping.

The domestic cat sleeps on average 12 to 16 hours per day, representing approximately two-thirds of its life. This prolonged rest is inherited from its wild ancestors, African wildcats, which conserved their energy between short but intense hunting periods. Feline sleep is composed of several phases, including light sleep and paradoxical sleep, during which the cat's eyes can move beneath its closed eyelids.

This propensity for rest contributes to the remarkable energy efficiency of the feline, a trait essential for a predator that must be ready to pounce in a fraction of a second. The cat's brain continues to process sensory information even during sleep, allowing it to detect suspicious movements or potential threats. This behavioral adaptation, combined with its highly developed muscles and ultra-fast reflexes, explains why the cat remains one of nature's most efficient hunters despite its long rest hours.