Impalas are unique, highly adaptable African antelopes without close relatives. Dominant in open woodlands bordering slightly sloped fully drained grasslands that give firm footing, Impala populations scatter while browsing on foliage and sporadically drinking nearby water. Impalas move by day, rest at night, but feed about 12-3 am. Both sexes are gracefully built with long necks, slender limbs, hock-length tails, and two-toned hides having vertical stripes down the back. Males have rippled, long, tapered, S-shaped horns.