They range over the Sahara from Mauritania to Sudan. Addra Gazelles are active during the day. In former times they could be seen in herds of as many as 500. The average herd size is now 15-20 animals. The drastic reduction is due largely to poaching.
Gazelles have an unusual pronging gait.
When they are playing or alarmed they bounce along stiff-legged with all four limbs landing together. Pronging may confuse predators and probably communicates alarm to other gazelles. Males establish territories, and during breeding season they actively exclude other mature males. They mark their territories with urine and dung piles and secretions from glands near their eyes. The animals breed seasonally so that births peak with early spring rains, and the females have adequate feed while nursing.