Guide to reference sources

All about Birds California by Cornell Lab of Ornithology

Field Guide to Amphibians and Reptiles of California by Robert C. Stebbins and Samuel M. McGinnis

Field Guide to Marine Mammals of the Pacific Coast by Sarah G. Allen; Joe Mortenson; Sophie Webb

Field Guide to the Birds of North America by John L. Dunn, Erik Bloom, Mary B. Dickinson, U. S. National Geographic Society Staff

Fishes: a Guide to Their Diversity by Philip A. Hastings

Mammals of North America by Roland W. Kays; Don E. Wilson

Beetles of Western North America by Arthur V. Evans

California Butterflies by John S. Garth; J. W. Tilden

Field Guide to California Insects by Kip Will

A field guide to the insects of America north of Mexico by Donald J. Borror

Spiders of North America by Sarah Rose and Eric R. Eaton

Introduction to California Spring Wildflowers of the Foothills, Valleys, and Coast by Philip A. Munz; Dianne Lake

North American Wildland Plants by James Stubbendieck; Stephan L. Hatch; Neal M. Bryan; Cheryl D. Dunn

Plant Galls of the Western United States by Ronald A. Russo

Smithsonian Trees of North America by W. John Kress, Lonnie G. Bunch, Margaret D. Lowman, Lonnie G. Bunch

Trees and Shrubs of California by John D. Stuart, John O. Sawyer, and Andrea J. Pickart

Trees of Western North America by David More, Richard Spellenberg, Christopher J. Earle, Gil Nelson, Amy K. Hughes

The Field Guide to Geology by David Lambert; Diagram Group Staff

Rocks and Rock Formations: a key to identification by Jürg Meyer and Mark Epstein

Geology of the San Francisco Bay Region by Doris Sloan