The number of monarch butterflies overwintering this year in Mexico has nearly doubled, according to the 2025 annual census.

The World Wildlife Fund's latest count of migratory ... habitat is nearly twice as large as last year's, but eastern monarch butterfly populations remain far below the long-term average.

However, due to a multitude of reasons, like the use of pesticides, the world's pollinator populations are dwindling. One example of this is the monarch butterfly. The monarch butterfly's ...