This year, more than 60 million monarch butterflies roosted in a four-and-a-half-acre patch of forest on the side of a ...

These butterflies have been found at altitudes as high as 22,000 feet, the highest of any butterfly species. European painted ladies migrate to Africa in fall, crossing the Mediterranean and often ...

Painted ladies are the ultramarathoners of the butterfly world—even more so than monarchs. Scientists have long known about their globetrotting tendencies, but only recently have their exact ...

He said his most prized butterfly costs $8,000 — which he keeps from sight, concerned about possible theft — and hopes to sell the collection to an individual or research institution. The ...