This is the Thompson’s Gazelle, also known as a Tommy. Named after the famous explorer that came through the Rift Valley on the 1880’s in search of the source of the Nile, these animals are very plentiful in east Africa. Even outside of the game reserves, it is not uncommon to see them roaming around unpopulated areas. They are small compared to most other antelope, and both the male and the female will produce small horns. Interestingly, they seem to not show much fear of humans, allowing you to approach to within 50 yards before slowly walking away. This picture was taken at Crescent Islandin Naivasha.