Here is a list of posts about birds, birding and attracting birds to your backyard.
Bird Behavior
Bird Migration Routes: Do You Live Near One?
How a Cardinal Makes His Red Feathers
The Relationship Between Birds, Berries, and Fruit
Birds of Prey (Raptors)
Birds of Prey of Philadelphia, and New Jersey: A Checklist
Identifying Birds of Prey: Books to Help You
Hawk Migration Watch at Fort Washington State Park
Creating a Backyard Habitat
How to Attract Birds to Your Garden
Attracting Bird with Fruit Trees and Berry Plants
Habitat Garden: What You Need to Start One
Water in Your Backyard Habitat
Cover: Providing Shelter in Your Backyard Habitat
Studying Birds
Searching for Abandoned Bird Nests
Birding by Ear: Learning Bird Calls and Songs
Spring Bird Migration for Beginners
Birds by Color: Identifying Birds
Identifying Birds by Color: A Collection of Photo Galleries
Birds by Color: Yellow Warblers
Winter Feeder Birds: Identifying Blue Birds
Winter Feeder Birds: Identifying Woodpeckers
Bird Checklists
Philadelphia Owls: A Checklist
Birds of Prey of Philadelphia, and New Jersey: A Checklist