This authoritative, easy-to-use photographic reference to over 250 species of invertebrate pollinators in the American West will introduce readers to the creatures that feed our flowers, protect our ecosystems, and power our agriculture. This guide covers the Western United states, including Colorado, Utah, Wyoming, Idaho, Montana, Nevada, New Mexico, Arizona, Washington, Oregon and California. This guide catalogs and profiles the invertebrate pollinators that the public are likely to encounter in the habitats of the American West, organized by order, family, and scientific name.