1. Nocturnal or Diurnal: Depending on the species, monkeys can be nocturnal (active during the night) or diurnal (active during the day).
2. Tree Sleepers: Most monkeys are arboreal, meaning they spend a lot of time in trees. They often build their sleeping nests in trees for safety and comfort.
3. Nest Building: Many monkeys construct elaborate nests for sleeping. These nests are made of leaves, twigs, and other plant material.
4. Group Sleep: Monkeys often sleep in groups for social bonding, protection from predators, and warmth.
5. Sleeping Time: The amount of sleep monkeys need varies by species. Some species, like the squirrel monkey, may only sleep for a few hours per day, while others, like the owl monkey, can sleep up to 18 hours per day.
6. Sleep Cycles: Monkeys have sleep cycles similar to humans, with periods of light sleep (REM sleep) and deep sleep (non-REM sleep).
7. Wakefulness: Some monkey species have brief periods of wakefulness during the night. They may move to different sleeping spots or adjust their nests during these times.
8. Sleep Disturbances: Similar to humans, monkeys can experience sleep disturbances, including insomnia and sleep apnea, due to factors like stress, illness, or changes in their environment.