There are several similar species in different areas of the Western Hemisphere; the two-tailed tiger, which occurs in Mexico and southern Arizona, is thought to be the largest butterfly in North ...

The U.S. Fish and Wildlife Service is taking steps to list monarch butterflies as threatened species and designate seven coastal California counties as critical habitats.

Museum Microlepidoptera curator Dr David Lees explains. There are more than 18,000 named butterfly species on the planet today, and about 140,000 different moth species. All of them evolved from a ...

That's why the Center is working hard to win them protection under the U.S. Endangered Species Act and to safeguard them from pesticides. In monarchs' overwintering groves, there were once so many ...

A study on painted lady butterflies reveals that their migration patterns are shaped by environmental cues rather than ...

Though isolated populations of monarchs exist in 90 different ... and bringing butterflies from all over the continent together to exchange genes, keeping the species strong and resilient.