Cerro Pelón is an extinct volcanic massif in the Monarch Butterfly Biosphere Reserve. Viewed from a helicopter, avocado plantations cover its foothills. Farming and commercial logging are spreading in ...

U.S. officials moved Tuesday to protect the monarch, an iconic orange-and-black butterfly famous for its marathon migration across North America, under the Endangered Species Act. The U.S. Fish ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The US Fish and ...

The U.S. Fish and Wildlife Service plans to add the butterfly to the threatened species list by the end of next year following an extensive public comment period. “The iconic monarch butterfly ...