Researchers used a nano-3D printing method to recreate the brilliant structural color of butterfly wings. It could pave the way for new screen technology.

Cabbage butterflies are one of few insect groups that have evolved changing tastes to tolerate chemical defenses of their plant hosts.

Autumn warming may explain a decline in Western butterfly populations. One species, the western monarch, has declined 99.99% since the 1980s.

Birds can learn to recognize fast and flashy butterflies they've failed to catch in the past—as well as similar-looking species—research finds.

Recent freezing weather in Texas likely means monarch butterfly numbers will drop again this year.

Milkweed is key to monarch butterflies' life cycle. But adding other flowering plants may help monarchs more than milkweed alone.

After mating, some male butterflies seal their mate's genitalia. But females have evolved ways of fighting back or getting around the "mating plug."

Loss of milkweed is the most likely reason for the incredible loss of monarchs, a new study of 1.4 million butterflies shows.

Even though eastern and western monarch butterflies have different styles of migration, they're genetically the same, researchers report.

Butterflies and bubbles can both produce irridescent colors. New research digs into how certain butterflies can create a rainbow of wing colors.