At what time of day do Catarrhines typically exhibit activity?

Catarrhines, which include Old World monkeys and apes, are predominantly diurnal, meaning they are active during the day and rest at night. This behavior is typical for many primate species as it aligns with their reliance on sight for foraging, social interaction, and avoiding predators. Being diurnal allows them to take advantage of the light to navigate their environment, find food, and engage in social activities effectively.

In contrast, nocturnal species are active at night, which is not the case for Catarrhines. Crepuscular refers to animals that are most active during twilight, at dawn or dusk, but this is not the primary activity pattern of Catarrhines. The term "galactic" doesn’t apply to any activity pattern in the context of animal behavior. Therefore, the classification of Catarrhines as diurnal accurately reflects their behavioral patterns and adaptations in their ecological niches.