© 2018-20 by Neil Henning Björklund

Buford Park, Lane Co, June 2

California

Tortoiseshell

Nymphalis californica

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