National Audubon Society

The most comprehensive field guide available to the flora and fauna of California--a portable, essential companion for visitors and residents alike--from the go-to reference source for over 18 million nature lovers. By Peter Alden and Fred Heath. Read more

The most comprehensive field guide available to the insects and spiders of North America--a must-have for any enthusiast's day pack or home library--from the National Audubon Society, the go-to reference source for over 18 million nature lovers. Read more

The most comprehensive field guide available to North American mammals--a must-have for any enthusiast's day pack or home library--from the National Audubon Society, the go-to reference source for over 18 million nature lovers. By Jr. John O. Whitaker. Read more

Full-color, National Geographic-quality photographs provide unsurpassed clarity and ensure virtually fool-proof identification of every specimen. By John L. Behler; F. Wayne King. Read more

From the creators of the world's most trusted field guides—a go-to source for millions of nature lovers—comes a completely new and unparalleled reference work: the most comprehensive, authoritative, and up-to-date guide to the trees of North America. Read more

The most comprehensive and authoritative guide to the wildflowers of North America, updated for the first time in decades to reflect the impact of climate change and the advancements in DNA studies that have radically altered the classification process. Read more