The Western monarch population has plunged more than 95% since the 1980s, and has a more than 99% chance of extinction by 2080. Western monarchs primarily spend winters along the California coast.

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 ...

The monarch butterfly, with its striking orange and black markings, has become a beloved species. But it’s struggling to survive. Last week, the U.S. Fish and Wildlife Service announced an ...