Phyciodes orseis, the Orseis Crescentspot or California Crescent, is a butterfly of the Nymphalidae family. It is found in the western North America, particularly northern California and Oregon. Formerly, The range was thought to extend along the Coast Range as far south as San Francisco. However, they were either mislabeled or are currently extirpated from these regions. The habitat consists of mountain valleys, meadows and stream canyons. Along with roughly 120 other species, they are check-listed as Butterflies Occurring on or near the Fremont-Winema National Forests. This checklist has been established based on observations throughout Lake and Klamath Counties in Oregon. The list is maintained by the Forest Service in order to monitor health of native ecosystems. Monitoring population