Baton Rouge Audubon Society

The Birdhouse Network

Cornell's Bluebird-L Reference Guide (with Alpha codes)

East Ascension Sportsman League

Florida Bluebird Society

Hodges Gardens State Park

Indiana Bluebird Society

Little Tchefuncte Hummingbird Hill Habitat

Maryland Bluebird Society

Michigan Bluebird Society

New York State Bluebird Society

North American Bluebird Society

Ohio Bluebird Society

Purple Martin Conservation Association

The Round Table Conferences

Sialis.org

Texas Bluebird Society

Toledo-Bend Gallery

Virginia Bluebird Society