California Insect Survey
Information on the basic aspects of California insect biology by UC Davis and UC Berkeley

CAS Entomology
The Entomology department at the California Academy of Sciences, includes a description of the insect collections at the CAS

BugGuide.net
A picture identification guide created and run by amateur naturalists

Bug People
A collection of photos of California insects

Discover Life
Pictures and taxonomic information on a variety of insects and other organisms

The California Beetle Project
An ongoing project working to catalog all of California's beetles

Animal Diversity Web
Insects at the University of Michigan Museum of Zoology, includes pictures, sounds, and classification information.

Tree of Life Web Project
A thorough and illustrated guide to insect taxonomy and phylogeny

Insects of Torrey Pines State Reserve
An introduction to the insects at Torrey Pines State Reserve

California's Endangered Insects
Information and photos of California's endangered, threatened, and extinct insects

The Xerces Society for Invertebrate Conservation
Information on invertebrate conservation

California Department of Fish and Game Special Animal List
A list of all threatened, endangered, and special concern animal species in California.

Monarch Watch
Information on Monarch butterflies by the University of Kansas