Irish elk
In 1998, Canadian biologist Valerius Geist hypothesised that the Irish elk was cursorial (adapted for running and stamina). He noted that the Irish elk physically resembled reindeer, and the body proportions of the Irish elk are similar to those of the cursorial addax, oryx, and saiga antelope. These include the relatively short legs, the long front legs nearly as long as the hind legs, and a robust and cylindrical body. Cursorial saiga, gnus, and reindeer have a top speed of over , and can maintain high speeds for up to 15 minutes.