Large collection of imagery related to North American forest insects. Topics include organisms, life stages, eggs, and damage caused. Browse by taxonomic order or by other categories (such as foliage feeders, gallmakers, stinging insects, and predators).
Information about a wide variety of commonly encountered insects found in California, with links to resources and photos. From the University of California.
Provides images of insects, but not butterflies and moths, from the printed books and manuscripts in the collections of the Smithsonian Institution Libraries.