Other notable gazelles include the rhim gazelle and dama gazelle. Typical quarry included the gazelle, hare, fox and jackal. Mammals include several species of antelope, such as Soemmerring's gazelle and Pelzeln's gazelle. The social structure of the springbok is similar to that of Thomson's gazelle. Sumerians caught many fish and hunted fowl and gazelle. Another reason for the decline of the dama gazelle is habitat destruction. The Arab people traditionally hunted the gazelle. A potential threat the dama gazelle faces is tourism. Human threats are the most dangerous of threats to the dama gazelle. Relatively few actions have been taken in the conservation of the dama gazelle. Ocelot is a BitTorrent tracker written in C++ for the Gazelle project. At a Mongolian nest, an apparently live-caught, dismembered adult Mongolian gazelle was observed. Another asterism known as the "Three Leaps of the Gazelle" is recognized in Arab culture. It is eventually revealed that Perry's legs resemble those of a gazelle.