Bird watching->United States (Northeastern & Mid-Atlantic)

Mid-Atlantic Birds: Backyard Guide - Watching - Feeding - Landscaping - Nurturing - Virginia, West Virginia, Maryland, Delaware, New Jersey, Pennsylvania

Club George: The Diary of a Central Park Bird-Watcher

Birds of Pennsylvania

Peterson Field Guide to Birds of Pennsylvania

Peterson Field Guide to Birds of New Jersey

Birds of New York Audio

Peterson Field Guide to Birds of New York

Birdwatching in New York City and on Long Island

Northeastern Birds: Backyard Guide - Watching - Feeding - Landscaping - Nurturing - New York, Rhode Island, Connecticut, Massachusetts, Vermont, New Hampshire, Maine

Birds and Marshes of the Chesapeake Bay Country

Birds of New York Field Guide with Audio CD

Mid-Atlantic Birds: Backyard Guide * Watching * Feeding * Landscaping * Nurturing - Virginia, West Virginia, Maryland, Delaware, New Jersey, and Pennsylvania

National Geographic Field Guide to Birds: Pennsylvania

Birds of Maryland & Delaware Audio

Birds of New York Field Guide

Birds of New York State

Delaware Birds: An Introduction to Familiar Species

Birds of New York City: Including Western Long Island and Northeastern New Jersey

National Geographic Field Guide to Birds New Jersey

Birds of Maryland and Delaware Field Guide and Audio CD Set

Birds of Maryland and Delaware Field Guide: Includes Washington DC and Chesapeake Bay

Compact Guide to New Jersey Birds

Feeder Birds of the Northeast: A Folding Pocket Guide to Common Backyard Birds

Birds and Birding at Cape May: What to See and When and Where to Go