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 regionFeatures more than 700 excellent color photographs, most of living butterflies photographed in the fieldProvides more than 300 regional larval host plant recordsPlus, 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.