, Family Brushfoot (Nymphalidae) Wingspan 1-3.5” Season April-June, August-September Food Plants Oaks Habitat Oak woodlands     The California sister is named for the black and white markings on the forewing which resemble a nun’s habit. This butterfly is quite common and can be seem flying slowing during the spring and summer in oak woodlands and gardens. It is often seen sitting on the ground sipping salts from mud. The California Sister flies twice per year -- April-June and August-September. caption: file: x - square 0" x 0" at 300 dpi - release: contact us regarding image add image to lightbox References Alden, Peter, and Fred Heath. National Audubon Society Field Guide to California. New York: Knopf, 1998. Acorn, John. Bugs of Northern Californa. Renton: Lone Pine, 2002. http://en.wikipedia.org/wiki/California_Sister_Butterfly