The population of the eastern monarch butterflies in Mexico doubled this past winter season, according to a WWF survey.

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

The eastern monarch butterfly population nearly doubled in 2025, but the numbers remain far below the long-term average.

The population wintering in central Mexico's forests occupied 4.42 acres, up from 2.22 acres during the previous winter.

This year’s count of 4.42 acres of occupied forest habitat is nearly twice as large as last year's, but eastern monarch ...

The monarch butterfly population has rebounded from a near record low number in 2024, according to the latest annual survey ...

Particularly when rural communities in Mexico have the lowest levels of domestic sewage treatment ... Copalita and other places along the Oaxaca coast. At the same time, the WWF-FGRA alliance started ...

Paid and presented by FGRA. Find out more about their project partner WWF Mexico here. A healthy river basin can ensure the long-term protection of communities, natural systems and biodiversity.