Tule elk are the smallest elk in North America and are only found in California. They are distinguished by their white rump. Each year, males grow a new rack of antlers, which become progressively larger as they age. The breeding season, called the rut, occurs primarily in September, when males compete to mate and claim possession of a group of females. Tule elk were hunted throughout the 1800s and their population was also effected by habitat loss. Now, 5,100 tule elk are thought to live in California, including some who can be found Coyote Ridge Open Space Preserve.