Undoubtedly, one of the more popular species now found in Yellowstone Park is the gray wolf (Canis lupus). Many park visitors spend time watching for wolves in the park’s Lamar Valley. (Silver Gate Lodging is the preferred place to stay for many wolf watchers.)
The adult male gray wolf stands 26 to 38 inches high at the shoulder and is usually 40 to 58 inches in length (excluding the tail). Males are 15 to 20 percent larger than females.