Urination and defecation on the same spot and in distinctive postures that vary little between gazelle species advertises territorial status. Black residue from scent glands is another advertisement. Females rarely scent mark.

Group sizes vary from 5-12 and up to 20 females and their calves. Males form small groups or may be solitary.

Reproduction is seasonal. The male establishes a territory in December/January. Estrous in females only lasts 12 to 24 hours, but reoccurs at 2-3 week intervals until conception. After a gestation period of 5½ months (May/June), a female delivers a single calf. After birth, calves are hidden, or “tucked”, for up to 6 weeks.

Courtship Behavior: The male approaches and displays until the female urinates. He sniffs her urine and follows her walking erectly. The male may make snoring/growling noises with his nasal pouch. As the female becomes more receptive to his advances her efforts to escape slacken and so do the male’s courtship displays. The couple then walks in tandem. Should the female stop the male resumes his displays to get her moving again. Mating occurs following a series of preliminary mounts, 10 to 20 and not infrequently up to 30 to 40. Courtship ends after a successful breeding. This cycle will repeat itself approximately 30 minutes later. The mating sequence lasts between 5 – 45 minutes provided there are no interruptions. The maximum copulations by a male in 24-hour period are 6.

Antipredator Behavior: Speke’s Gazelles will shake/twitch their flank skin prior to flight. Females will cooperatively defend young by driving away small predators such as jackals that have caught or are seeking concealed fawns. Although faster than their predators, except the Cheetah, gazelles lack endurance and reach exhaustion within 2-3 miles. Against the Cheetah, their strategy is to turn sharply to evade capture.

The gazelles are also the most widely distributed members of the tribe Antilopini. Species are found from South Africa across Asia and into Siberia and China.