The Butterflies of Cascadia by Robert Michael Pyle
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Seattle Audubon Society
Flexibound: 420 pages ; 6" x 9"; Seattle Audubon (2002)
This definitive work on the butterflies of the Northwest is the long awaited successor to Robert Michael Pyle's much-loved Watching Washington Butterflies, also published by the Seattle Audubon Society. Butterflies of Cascadia is much more ambitious, a comprehensive guide to the entire Pacific Northwest region.
Containing more than 600 color photographs as well as superb paintings and spread specimens for almost every species, this book identifies and illuminates the entire Northwest fauna.