An illustrated field guide to North American butterfly species also acts as a complete natural history, fully describing the biological and ecological world of butterflies for collectors and advanced naturalists alike. Simultaneous.
A truly impressive piece of work. Photos include both specimen photos and in-the-field photos of butterflies, larvae, and eggs. It's a hefty work, so not one you'd take along in the field, but it's definitely a valuable—and valued—addition to my library.