Field Guide to Butterflies of the San Francisco Bay and Sacramento Valley Regions
by Aurthur Shapiro & Timothy Manolis
A compact and information filled, well-written little gem in a handy backpacking size. The best butterfly book we know of.
"With superb illustrations and concise, up-to-the minute synopses of butterfly biology..." - Robert Michael Pyle
"A masterpiece on the butterflies of the San Fancisco Bay and Sacramento Valley regions." - Paul Opler
"An accessible and entertaining guide to the natural history of Bay Area and Sacramento Valley butterflies" - Carol Boggs