This book presents a comprehensive catalog of Lepidoptera observed in Ontario between 2006 and 2007. Authored by Ross A. Layberry, a recognized entomologist, the work details the species, their distribution, and potentially their population dynamics within the specified period. It serves as a critical reference for understanding the butterfly and moth populations of the region during those years.

This specialized monograph is expected to be a valuable resource for entomologists, lepidopterists, and researchers focused on the insect fauna of Ontario. Its value lies in its specific temporal and geographical scope, providing a snapshot of species presence and distribution during the 2006-2007 period. The work is likely to be cited in further ecological studies and regional biodiversity assessments.