A rare hybridization event between the Eastern tiger swallowtail and the Canadian tiger swallowtail gave rise to the ancestor that started the Appalachian tiger swallowtail lineage.
Female caterpillars raised in cool and dry seasons will actively pursue males when they become butterflies
A color-changing patch modeled after the iridescent wings of butterflies could give soldiers a heads-up on the severity of injuries sustained on the battlefield.
The largest butterfly's wingspan stretched almost a foot across. One the rarest butterflies in the world, it's found only in the rainforests of New Guinea.
Female butterflies lay their eggs on toxic milkweed to prevent disease in their offspring
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