The upperside of the wings is orange with broad brown margins, and lighter markings in the median parts of the wings can be present to almost absent. Males have a thin, black stigma running lengthwise down most of the forewing. On the underside (visible when the butterfly is resting with wings fully folded), the hindwings (which rest lower on the body) have a gray or greenish hue, a crescent- or chevron-shaped set of white or pale yellow spots near the middle, and a white C-shaped spot near the base. Spots on the underside of the forewing are typically squarish and may be white to pale yellow.
Overview
Species Common Name Oregon Branded Skipper (butterfly)
Habitat consists of westside forests and woodlands and high elevation forests and woodlands. Within these habitats, H. c. oregonia populations are found largely in sunnier locations with abundant grasses such as forest openings, meadows, roads, or trails. Bunchgrasses are important for larvae, as the species constructs larval shelters using these types of grass species.
Limiting factors
Threats to this species include habitat loss, invasive species, livestock grazing, and disruption of disturbance regimes. Insecticides and herbicides are threats to all life stages. Vulnerable to predicted increases in fall temperatures.
Data gaps
Conduct genetic analysis. Assess distribution and determine range of subspecies. Research larval host plant and other microsite requirements.
Conservation actions
Monitor existing populations and habitat. Survey suitable habitat for new populations. Manage grazing and recreation to minimize disturbance at occupied sites. Manage habitat to provide preferred host and nectar species. Remove invasive vegetation and reduce woody succession.
Key reference or plan
Burls, K.J., E. Blevins, and S.F. Jordan. 2021. Interagency Special Status/Sensitive Species Program (ISSSSP) Species Fact Sheet: Hesperia colorado oregonia. USDA Forest Service Region 6 and USDI Bureau of Land Management Oregon State Office. 24 pp. Read here
