North American Bluebird Society  
   An incorporated non-profit organization determined to increase the populations of the three species of bluebirds on the North American continent.
   http://www.nabluebirdsociety.org/

Bluebirds are Free  
   Attracting wild blue birds (well, Scrub Jays, actually) to the hand. Includes video and photos. Lessons on respecting the freedom of wild creatures .. and other humans.
   http://www.wordwiz72.com/bbird.html

Bluebird Habitat Inc.  
   General information about Eastern Bluebirds and bluebird houses from a North Carolina non-profit organization.
   http://BluebirdHabitat.org/

American Family Bluebird Trail Project  
   Bluebird information and resources from American Family Insurance.
   http://www.bluebirder.com/

Bluebird Restoration Association of Wisconsin  
   Assists the Wisconsin bluebirder to increase knowledge and enthusiasm for bluebirds.
   http://www.BRAW.org

Living with the Mountain Bluebirds  
   Photos and excerpts from Helen Johnson's book and video of Mountain Bluebirds in Arizona.
   http://www.cybertrails.com/~mtsialia

Bluebird-L Reference Guide  
   Originates from North American Bluebird Society (NABS)/Cornell Ornithology email list is the most extensive compilation of educational and other references for the backyard bluebirder as well as the experienced trail monitor.
   http://bluebird.htmlplanet.com/

The Bluebird Box  
   Articles, and nestbox designs.
   http://audubon-omaha.org/bbbox/

The Eastern Bluebird  
   Bluebird pictures and nestbox plans.
   http://hometown.aol.com/kanth81842/myhomepagephoto.html

Bluebirds, Bird Watching, and Feeding  
   Information on bluebirds, identification, photos, birds feeder projects, and nest box instructions.
   http://www.uslink.net/~rosebudm/bluebird.html

How to Build a Bluebird House  
   Brief information on Western Bluebirds and how to build a house for them.
   http://www.laspilitas.com/bluebird.htm

Eastern Bluebird  
   Introduction to Eastern Bluebirds and their habitat requirements from the U.S. Department of Agriculture.
   http://www.npwrc.usgs.gov/resource/1999/eastblue/eastblue.htm

Matt Bailiff's Eastern Bluebird Page  
   General information about bluebirds and bluebird trails from personal experience in Kansas.
   http://k1bluebird.tripod.com/ebluebird.html

Texas Bluebird Society  
   A non-profit educational organization promoting the conservation of bluebirds and other native cavity-nesting birds. Includes newsletters, events, photos, nestbox plans, and facts.
   http://www.texasbluebirdsociety.org/

Maryland Bluebird Society  
   A non-profit, volunteer organization dedicated to conservation of the Eastern Bluebird. Includes sections on getting started, monitoring bluebird trails, photos, events, and a forum.
   http://www.marylandbluebirdsociety.org/

Build a Nest Box to Attract Birds  
   University of Nebraska Cooperative Extension in Lancaster County factsheet on building nest boxes to attract birds.
   http://lancaster.unl.edu/enviro/pest/factsheets/024-99.htm