Size: Up to 2.5 inch wingspan
Key ID features: Above bright orange with black and white patches on the leading edge of FW, a few smaller black spots on FW, and dark border on FW and HW. Below striated two-toned with darker inner half and brown outer half with darker margin, and often a dark gray-blue submarginal line.
Similar species: Above, Milbert's dark basally with bright orange rim. Below, Milbert's Tortoiseshell more distinctly two-toned, outer band lighter, more variable and more gray than brown.
Host plant: Ceanothus species include snowbrush (C. velutinus), deerbrush (C. integerrimus).
Habitat: While dispersing, may be found in any habitat, including in the middle of urban areas. Otherwise in mountain slopes, canyons, meadows, riversides, road edges and shorelines.
Range: Throughout Oregon.
Season: Late January to early December.
Abundance: Common, abundant in some years.
Conservation Status: Secure