• Butterflies of North America - Excellent resource!
• Children's Butterfly Site - Good site for kids and teachers
• Electronic Resoures on Lepidoptera - Both butterflies and moths, very comprehensive site

Arkansas

• Mt. Magazine International Butterfly Festival

Arizona

• NABA-Southeast Arizona Butterfly Association

California

• LANABA - Los Angeles
• NABA-Orange County

Florida

• LEPSrUS (Florida Butterflies Listserver)
• NABA-Atala Chapter (Palm Beach County)
• NABA-Broward Chapter
• NABA-Choctaw Chapter
• NABA-Miami Blue
• NABA-Pinellas County
• NABA-Sarasota County Butterfly Club

Georgia

• Butterflies of Georgia
• Georgia Butterflies - Many county records documented with photographs

Hawaii

• Butterflies of Hawaii

Illinois

• Illinois Butterfly Monitoring Network

Kansas

• Ark Valley Butterfly Club
• Kansas Lepidoptera Listserver

Massachusetts

• Massachusetts Butterfly Club - NABA Chapter

Michigan

• NABA-West Michigan

Minnesota

• NABA-Northern Crescents Chapter

Missouri

• NABA-St. Louis

New Jersey

• North Jersey Butterfly Club - NABA Chapter

New York / New Jersey

• Mulberry Wing Online - New York City Butterfly Club & NABA-North Jersey Butterfly Club

North Carolina

• Carolina Butterfly Society
• North Carolina Butterflies
• Notes on the Butterflies of North Carolina

Ohio

• Chrysalis in Time -- NABA-Northeastern Ohio

Ontario

• Toronto Field Naturalists

Oregon

• NABA-Eugene-Springfield

Rhode Island

• Butterfly Society of Rhode Island

South Carolina

• Carolina Butterfly Society
• Notes on the Butterflies of North Carolina -- Also records of South Carolina butterflies

Tennesee

• NABA-Middle Tennessee

Texas

• Bentsen Palm Village - Birding and butterflying in south Texas
• NABA-Butterfly Enthusiasts of Southeast Texas
• NABA-South Texas
• Texas Butterfly Festival - Mission Texas
• Texas Lepidoptera Listserver
• Valley Nature Center
• World Birding Center - Birding and butterflying in south Texas

Utah

• Utah Lepidopterists' Society

Virginia

• Butterfly Society of Virginia

Washington

• NABA-Washington Butterfly Association

Washington, DC

• Washington Area Butterfly Club (Northern VA, DC and MD)

Wisconsin

• Butterflies of Waushara County
• Butterflies of Wisconsin

• NABA Butterfly Gardens and Habitats

• Butterfly Gardening -- Florida
• Butterfly Gardening -- Monarch Watch
• Butterfly Gardening -- West Virginia
• Central North Carolina Butterfly Plants
• Native Butterfly Gardening -- Florida
• Silver Spring, Maryland Butterfly Garden
• Smithsonian Butterfly Garden

• Butterflies of Southeastern Arizona
• Interactive List of Mexican Butterflies
• Photographic Checklist of Butterflies of the Lower Rio Grande Valley
• Windows On Nature

• Association for Tropical Lepidoptera
• The Lepidopterists' Society
• Monarch Watch
• The Xerces Society