The Western population of the monarch ... by 2080. Habitat destruction, pesticides and extreme weather fluctuation due to climate change are all to blame for the butterfly’s decline.

MADISON, Wis. (AP) — The number of monarch butterflies spending the winter in the western United States has dropped to its ...

The U.S. Fish and Wildlife Service is taking steps to list monarch butterflies as a threatened species and designate seven California counties as critical habitats to deter a 99% likelihood of ...

A monarch butterfly at the Coastal Access Monarch Butterfly Preserve in Los Osos, Calif., on Jan. 20. (Gary Coronado / Los Angeles Times) ...

The Western population of the monarch ... to 4 million butterflies were estimated to spend winter in California, according to the California Department of Fish and Wildlife. Without urgent ...

Fewer-than-usual monarch butterflies migrated through San Luis Obispo County this winter, according to data from the conservation-focused nonprofit the Xerces Society. “It feels like a punch to ...

The Western population of the monarch butterfly has declined to a near-record low with fewer than 10,000 found living in California this winter, a foreboding sign for the future of the beloved ...

Monarch butterflies have declined 80 ... But the iconic orange and black butterflies are facing threats from habitat loss, climate change and the use of insecticides, according to Lisa Nordstrom ...