Giraffes sleep for only a few hours a day, often in short standing naps.

The longer version

Giraffes get only a small amount of sleep each day, mostly in brief standing episodes of a few minutes, though they also fold down and rest the head briefly for deeper phases. Total daily sleep for an adult is measured in single-digit hours, far below most mammals of comparable size. Large grazing animals tend to sleep little.

The pattern fits a prey animal that must stay alert while digesting a bulky diet over long hours. Rumination competes with sleep time. Elephants show a similar shortfall, and both contrast sharply with cats and other predators that sleep much of the day. Field and zoo observations agree on the broad picture, and both suggest the long naps described in older travel accounts are unusual.

Where this entry sits

This collection gathers curious details about sleeping and dreaming, from nightly brain stages and body clocks to naps, yawns and unusual animal habits. It also covers how bedtime customs have changed across centuries, without offering any advice. The full list sits on the Sleep and Dreams page, where every entry is listed in order.