This guide is an updated sequel to the ground-breaking 1991 guide by the same two authors.

• This new work treats in depth all 273 species recorded in the region
• Features more than 700 excellent color photographs, most of living butterflies photographed in the field
• Provides more than 300 regional larval host plant records
• Plus, color images of common nectar sources, caterpillars and habitats, range maps for all but the most common and widespread species, and an illustrated comparison guide to the difficult-to-identify duskywings.