As part of a collaborative USDA and University of Wyoming website on grasshoppers (reported on in the NSDL Scout Report for the Life Sciences, May 16, 2003) this site offers a great Field Guide to Common Western Grasshoppers by Robert E. Pfadt. The online field guide includes sections on External Anatomy, Life Cycles, Grasslands of North America, Food Plants, and more. The site's text descriptions are supported with clear, detailed diagrams and nicely organized tables. In addition, the site contains a Glossary with many terms hyperlinked to corresponding diagrams in the guide. The site also offers a sizeable list of Selected References, and excellent fact sheets for 56 species of grasshopper.