Variable Checkerspot Butterfly (Euphydryas chalcedona) on Ceonothus
Quite variable -- see other browner/lighter forms in this collection. Which ceonothus? Please leave a comment! Off of Trail 9 near the relay station at the top of a rise, from where the birders look across Portola Road to the egret rookery in the redwoods. Butterfly ID by Judy Kramer.