Impala are diurnal, which means they are most active in the early morning and right before sunset. During the rainy season, impalas gather in groups of hundreds. In the dry season, the herds roam together to look for food. During the rainy season, males can be territorial and will herd females around a territorial area. Groups of young impalas are called creches. These groups of offspring are like nursery schools for the young and they play together and groom each other. Impalas are herbivores, which means they only eat vegetation. Their diets consist of bark, leaves, wood, and stems.