Bright, full-color photographic keys and detailed information make these field guides the standard for amateur naturalists. You won’t find better field guides anywhere for the money. These guides are easy-to-use and have washable soft vinyl covers to protect them from the elements. Terrific resources for any classroom. Glossary, index, 600–1000 pages each, 4" × 7", vinyl cover. Eastern region is land up to the continental divide.