Butterfies

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.

Monarchs are flying too far north for their own good.

The butterflies will show up in the U.S. soon — to live or die in Texas.

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

Step inside the American Museum of Natural History's live butterfly exhibit.

Photo gallery of butterflies and moths from around the tropics.

These colorful insects fly over mountains to set up house