Butterfly

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

The rich, shimmering colors of some butterfly wings are produced not by pigments, but by a special geometric formation of cells, a new study suggests.

The iridescence of butterfly wings will soon see use as security patches on banknotes. Scientists have unlocked the secrets behind the microscopic structure that makes simultaneous colors possible.

Researchers have built and flown a replica of a swallowtail butterfly to see how it flies.

Butterfly Colors and Vision Are Related.

Study of monarch butterfly wings shows migratory populations have longer wings.