Lower Deschutes River. C. acastus sterope (formerly known as C. palla sterope) male.
Lower Deschutes River. C. acastus sterope mating pair, bright male contrasting with dark female.
Lower Deschutes River. C. acastus sterope mating pair, dorsal view.
Comment. Found in sagebrush country through much of the Southwest. Just reaches into the far southeast corner of Oregon but subspecies sterope found along the Deschutes River. Despite the name, its host plant is rabbitbrush or desert aster.
Similar species. Compare to Northern Checkerspot. Hind wing below has white bands and partial orange spot bands while Northern has yellowish bands and more complete orange spot bands. The Death Valley specimen has minimal black markings and superficially resembles a fritillary. Populations further east and north have more typical checkerspot colors making this a variable species.Back