Michoacan's monarch butterfly population threatened by climate change.

The population of monarch butterflies wintering in Mexico's Michoacán state has dropped by 22% in just one year due to climate change and habitat loss. The species was entered into the International Union for Conservation of Nature's Red List of Threatened Species as "endangered" in 2022. Loss of habitat in Mexico is leading many of these eastern monarch butterflies to winter instead along the West Coast of the United States. Restoring monarch habitats and slowing down global warming is critical to protect the species and the unique migratory phenomenon in nature.