Audubon Society - Bluebirds
Nest Watch - Cornell Lab of Ornithological
Cornell Lab of Ornithological - Mailing Lists
The Virtual Birder
Is There A Need To Feed Bluebirds?
Types of Birds - Everything About Bluebirds - (About.com)
Bluebird Information and Awareness
Bluebird Conservation Project
Penn State University-Managing Bluebird Habitat-search on Bluebirds
Ohio Bluebird Society
Ontario Canada Eastern Bluebird Society
PA Game Comm - tab to Wildlife, Birds, Bluebirds
Pennsylvania E-birds
PA Breeding Bird Atlas
Tri State Bird Rescue

Bluebird Trails: a Guide to Success by Dorene Scriven; Published by the Bluebird Recovery Committee of the Audubon Chapter of Minneapolis, 1993.

Bringing Back the Bluebirds by Andrew M. Troyer; Published by The Birds' Paradise, 20835 Morris Road, Conneautville, PA 16406, (Telephone - 1-800-872-0103), 1995.

The Bluebird Book by Stokes, 1991, Little, Brown & Company.

Enjoying Bluebirds More - The Bluebird Landlord's Handbook by Zickefoose, 1993, Bird Watchers Digest Press (Pamphlet).

Bringing Back the Bluebirds by Troyer, 1994, Carlisle Printing Co. (Pamphlet).

Cornell Nest Box Network Research Text by Cornell Lab.

A Field Guide to the Birds - Eastern & Central North America by Roger Tory Peterson; Published by Houghton Mifflin Co., 1990.

Field Guide to the Birds of North America; Published by The National Geographic Society, 1999.

Woodcrafting for Wildlife-Homes for Birds and Mammals by Jerry Hassinger. Published by the PA Wild Resource Conservation Fund and the PA Game Commission.

Bird's Nest by Harrison (Peterson Field Guide), 1975, Houghton-Mifflin Company.

A Guide to the Nest, Eggs, and Nestlings of North American Birds, second edition, by Baicich & Harrison, 1997, Academic Press.