Scientists are grappling with a stark population decline of the western monarch butterfly after the species’ numbers hit a ...

The Western population of the monarch butterfly has declined to a near-record low with fewer than 10,000 found living in ...

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 ...