Butterflies of the Pacific Northwest, Washington, Oregon and Idaho. This guide beautifully illustrates 84 species of butterfly along with their caterpillars found in the mountains, deserts, urban and coastal areas of the Pacific Northwest. This pocket-sized guide features stunning color photos in a side-by-side format that makes it ideal for field use. Included along with most of the more common species are several of the most unique species of the region. Common and scientific names, adult size, season when they can be found, and their caterpillar host plants are listed. Nature enthusiasts of all ages will enjoy using this marvelous guide.