the Butterflies of the United States and Canada (2008). Pyle, Robert Michael The Butterflies of Cascadia (2002). External links Tree of Life Heliconiinae Heliconius Butterfly Website Heliconius Genomics Project Information about Heliconius Heliconius charitonia, zebra longwing on the UF / IFAS Featured Creatures Web site Butterflies and Moths of North America Butterflies of America - Butterfly subfamilies