Thomas Marent / Crimson-patched Longwing (Heliconius erato) butterfly, Colombia

Rod Williams / Red or Small postman (Heliconius erato) feeding on milkweed, Central and South America.

Angelo Gandolfi / Red postman butterfly (Heliconius erato) (above) and Tiger longwing (Heliconius hecale) La Paz Waterfall Gardens, Costa Rica.

Nick Hawkins / Small postman butterfly (Heliconius erato) photographed on white background, Costa Rica.

Loic Poidevin / Red postman butterfly (Heliconus erato) on leaf, captive, occurs in the Americas.

Steve Gettle / Crimson-patched Longwing (Heliconius erato) butterfly pair, Ecuador

Gerry Ellis / Crimson-patched Longwing (Heliconius erato) caterpillar trio eating leaf, Costa Rica

ZSSD / Crimson-patched Longwing (Heliconius erato) butterfly on leaf, native to South America

Michael & Patricia Fogden / Crimson-patched Longwing (Heliconius erato) buttterfly feeding on Lantana flower (Lantana sp) in the rainforest, Costa Rica

Michael & Patricia Fogden / Crimson-patched Longwing (Heliconius erato) butterfly feeding on Lantana flower (Lantana sp) in the rainforest, Costa Rica

Thomas Marent / Crimson-patched Longwing (Heliconius erato) butterfly, Rio Claro Nature Reserve, Colombia

Steve Gettle / Crimson-patched Longwing (Heliconius erato) butterfly, Ecuador

Joel Sartore / Photo Ark / Red postman butterfly (Heliconius erato) portrait, Urku Center, Peru. Captive.

Joel Sartore / Photo Ark / Red postman butterfly (Heliconius erato) resting, portrait, Urku Center, Peru. Captive.

Edwin Giesbers / Digital composite of Tiger longwing butterfly (Heliconius hecale), Red postman butterfly (Heliconius erato) and Banded Orange Heliconian butterfly (Dryadula phaetusa) on flower. Captive.