The Thomson's Gazelle (Eudorcas thomsonii) is one of the best-known gazelles. It is named after explorer Joseph Thomson and is sometimes referred to as a "tommie". It is considered by some to be a subspecies of the red-fronted gazelle and was formerly considered a member of the genus Gazella within the subgenus Eudorcas, before Eudorcas was elevated to genus status. Thomson's gazelles can be found in numbers exceeding 500 thousand in Africa and are recognized as the most common type of gazelle in East Africa.
Thomson's gazelles are 55 to 82 cm (22 to 32 in) tall, body length of 80 to 120 cm (31 to 47 in), and weigh 15 to 25 kg (33 to 55 lb) (females), 20 to 35 kg (44 to 77 lb) (males). They have light brown coats with white underparts and distinctive black stripes on the sides. Their horns are long and pointed with slight curvature. The white patch on their rumps extends to underneath the tail, but no further. Grant's gazelles are sometimes mistaken for Thomson's gazelles. Although some Grant's do have the black stripe running across their sides, the white on their rumps always extends above the tail.
The Thomson's gazelle lives in Africa's savannas and grassland habitats, particularly the Serengeti region of Kenya and Tanzania. It has narrow habitat preferences, preferring short grassland with dry, sturdy foundation. It does, however, migrate into tall grassland and dense woodland.
The Thomson's Gazelle is an herbivore that combines nicely with other grass-eating species. These animals spend a lot of time "greeting" one another. Like many other small animals in the game, they reproduce incredibly fast. The salt lick is the only enrichment item recommended for them. Thompson's gazelle is not a swimmer. Males will often mate with more than one female. They will happily coexist with the Plains Zebra.