Developed by the creators of the best-selling Audubon field guides, this handsome volume is the result of a collaboration among leading scientists, scholars, taxonomic and field experts, photo editors, and designers. An indispensable reference, it covers more than 800 species, with over 3,500 full-color photographs of birds in their natural habitat, often with four or five images of each species. For ease of use, the book includes a glossary, an index, and a ribbon marker, and is arranged according to the American Ornithological Society's latest Checklist of North and Middle American Birds—with birds sorted by taxonomic orders and grouped by family, so that related species are presented together. Range maps, reflecting the impact of climate change, accompany nearly every entry, along with a physical description and information on voice, nesting, habitat, and similar species. This guide also includes an important new category on conservation status and essays by leading scholars in each field who provide holistic insights into the world of birds. Whether trying to determine which owl is interrupting your dinner or successfully identifying all of the warblers that arrive in spring, readers will come to rely on this work of remarkable breadth, depth, and elegance. It is a must-have reference for the library of any birder, and is poised to become the number one guide in the field.