Here's the official press release from ROM Press:
This is the very first field guide on the butterflies of Ontario. It highlights the diversity of life by featuring a staggering 167 species of butterflies known to occur in Ontario. The ROM Field Guide to Butterflies of Ontario includes descriptive species accounts, flight season phenograms, and striking field photography of adults and caterpillars. Using range maps based on hundreds of thousands of historical records, and what we believe to be a first for a field guide: computer-modelled predictive distributions, this book illuminates the complete life history of these butterflies. The field guide’s easy-to-access approach, comprehensive coverage, and beautiful design make it an essential guide for both amateur naturalists and professional lepidopterists.