Butterflies through binoculars

"Jeffrey Glassberg here shows us how to find, identify, and enjoy all of the butterflies native to the eastern half of the United States and southeastern Canada. The guide combines the immediacy and vividness of actual photographs of living butterflies in their natural settings with the traditional field guide format, emphasizes conservation over collection, includes 625 color photographs of butterflies in the wild, provides color maps that show where each species occurs and for how much of the year, and supplies entirely new field marks for butterfly identification."--BOOK JACKET.