Every year, for millions of years, a huge number of painted lady butterflies have migrated thousands of miles across Europe, the Middle East and Africa. Though they’ve been a common sight throughout ...

The migration of animal species is a common natural event that happens each autumn across the North American continent. Many species of birds and even mammals, such as the great whales, travel ...

Yesterday our photographer Katie Sokoler made her annual trek to the Butterfly Conservatory at the American Museum of Natural History, which focuses on "Tropical Butterflies Alive in Winter." The ...

A new study has revealed a strange relationship between an Amazonian butterfly species and its neighboring ants — the butterflies steal the ants' yummy and nutritious goo. Here's a look at the first ...