New York just might be the most biologically diverse city in temperate America. The five boroughs sit atop one of the most naturally rich sites in North America, directly under the Atlantic migratory flyway, at the mouth of a 300-mile-long river, and on three islands—Manhattan, Staten, and Long.

Leslie Day, a New York City naturalist, reveals this amazing world in her Field Guide to the Natural World of New York City. Combining the stunning paintings of Mark A. Klingler with a variety of photographs and maps, this book is a complete guide for the urban naturalist—with tips on identifying the city's flora and fauna and maps showing the nearest subway stop.

Here is your personal guide to the real wild side of America’s largest city. Throw it in your backpack, hop on the subway, and explore.