TERRESTRIAL INVERTEBRATES GUIDE

Field Guide References for Terrestrial Insects and Spiders

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North American Insects and Spiders - Cirrus Digital Imaging
A catalog of over 5,000 high-resolution close-up pictures of live, wild insects and spiders with descriptions, taxonomy and natural history. Many of the images are free for noncommercial use.

Haggard, P. 2006. Insects of the Pacific Northwest. Timber Press. (ISBN: 0881926892)