Roxy Ann Peak's high biodiversity is due to its wide range of elevations and its location between the Cascade, Klamath, and Eastern Cascade ecoregions.
The peak is home to many species of birds, including blue-gray gnatcatchers, lazuli buntings, oak titmice, acorn woodpeckers, and California quail on the lower slopes, and mountain quail, mountain chickadees, and red-breasted nuthatches on the upper slopes.