Animals that are active during the day are referred to as diurnal. This term comes from the Latin word "diurnus," meaning "daily" or "of the day." Diurnal creatures, such as many birds, primates, and some reptiles, rely on daylight for various activities such as foraging, mating, and social interactions. Their physiological and behavioral adaptations, such as visual acuity suited for daytime conditions, help them thrive in daylight environments. Diurnal species often have their nighttime counterparts, known as nocturnal species, which are more active during the night.