National Audubon Society Field Guide to the Mid-Atlantic States: New York, Pennsylvania, New Jersey, Maryland, Delaware, West Virginia, Virginia

Audubon Society Field Guide to North American Trees: Eastern Region

National Audubon Society Field Guide to New England: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont (National Audubon Society Field Guides)

National Audubon Society Field Guide to North American Wildflowers--E: Eastern Region - Revised Edition (National Audubon Society Field Guides)

National Audubon Society Regional Guide to the Southeastern States: Alabama, Arkansas, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, ... (National Audubon Society Field Guides)

National Audubon Society Field Guide to North American Birds: Eastern Region, Revised Edition

Birds of Pennsylvania Field Guide, Second Edition

National Audubon Society Field Guide to Insects and Spiders: North America (National Audubon Society Field Guides)

Birds of Virginia Field Guide

National Audubon Society Field Guide to Fishes: North America

Mid-Atlantic Birds: Backyard Guide - Watching - Feeding - Landscaping - Nurturing - Virginia, West Virginia, Maryland, Delaware, New Jersey, Pennsylvania (Bird Watcher's Digest Backyard Guide)