Mark Williams was out with his butterfly net in his favorite South African mountain range when a flutter of gray-blue wings sailed by. They were almost as small and nondescript as the other gray-blue ...

Female monarch butterflies have no trouble finding a mate – even when a parasite kills most of the males, new research shows. Some females carry a parasite called Spiroplasma that kills all their male ...

Female butterflies make smart investments, finds a new study. What do CPUs, stockbrokers, and butterflies have in common? They are good at investing their resources in the right place at the right ...

The Appalachian tiger swallowtail butterfly is a rare breed: Some 100,000 years ago, two different species mated and their hybrid offspring gave rise to the Appalachian species, researchers have found ...

PORTLAND, Ore. — Conservationists have successfully bred the extremely rare Oregon silverspot butterfly in captivity, a potential breakthrough for saving a species that once was found in coastal ...

Researchers have created a hybrid butterfly whose genes and color are blends of two other species. New species typically arise from the branching of one species into two, but in Thursday's issue of ...

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The leader of the net-toting group is Mark Williams, who has traveled widely, fending off baboons and dodging hippos and snakes, in search of his obsession. ark Williams was out with his butterfly net ...