One of Africa’s most graceful antelopes, impalas are particularly numerous along rivers and other permanent water supplies where they come to drink usually twice a day, in the early morning and evening. However impalas are not water dependent and can obtain enough moisture from grazing succulents. They live in groups with an average of 10 to 60 individuals. Impalas being very wary of danger, at least one herd member acts as a sentinel. Herds are often found in association with other antelopes or baboons.