Monarch Butterfly Population Jumps 64% in Mexico, Providing Hope for At-Risk Species
The population of monarch butterflies in Mexico has surged by 64% this winter compared to the same period in 2025, offering a significant glimmer of hope for an insect considered at risk of extinction. According to figures released this week by the World Wildlife Fund (WWF) Mexico, the area occupied by monarchs expanded to 2.93 hectares (7.24 acres) of forest from 1.79 hectares (4.42 acres) the previous winter, marking the largest coverage since 2018.
Symbolic Migration and Conservation Efforts
Every fall, tens of millions of monarch butterflies embark on a nearly 3,000-mile journey from Canada, across the United States, and finally to the forests of western Mexico. There, the orange insects cover entire trees and flutter through the air in spectacular fashion. Mexican environment minister Alicia Bárcena Ibarra emphasized the importance of this migration at a news conference on Tuesday, stating, "The monarch butterfly is the symbol of the trilateral relationship between Mexico, the United States and Canada. Its conservation is a collective commitment we must maintain for the future."
Threats to Monarch Butterflies
Despite this positive news, monarch butterflies face severe threats from habitat loss due to deforestation, the climate crisis, and the use of pesticides. In the United States, the increasing application of herbicides like glyphosate and dicamba has drastically reduced the availability of milkweed, the only plant that monarch caterpillars can eat, leading to plummeting butterfly numbers. As a result, the Biden administration proposed listing the monarch as threatened under the Endangered Species Act at the end of 2024, but Trump officials have since delayed the decision indefinitely. In February, two environmental groups filed a lawsuit to compel the Trump administration to set a date for protections. Tierra Curry, endangered species co-director at the Center for Biological Diversity, commented, "It would be unforgivable for [the monarch's] epic migrations to collapse because of political cowardice on enacting range-wide protections for them. Even the Trump administration has to think twice about letting these iconic butterflies collapse toward oblivion."
Habitat Loss in Mexico
In Mexico, the spread of avocado farming in the state of Michoacán has led to vast swaths of forest being lost to illegal logging, partly driven by organized crime groups infiltrating the highly profitable avocado trade. Compared to a peak of nearly 18.21 hectares (45 acres) in the winter of 1995, the area covered by monarchs in Mexico today is just a sliver and well below the 6.07 hectares (15 acres) that scientists deem necessary for the species' survival. The involvement of cartels in logging has at times turned deadly; in 2020, Homero Gómez González, a prominent monarch butterfly conservator in Mexico, was found dead, with his family suspecting he was murdered by organized crime groups intent on clearing the monarch's habitat.
Conservation Successes and Future Challenges
However, conservation efforts have slowed logging in recent years. From a peak of nearly 500 hectares (1,235 acres) of forest affected in 2003-2004, just 2.55 hectares (6.3 acres) were impacted between February 2024 and February 2025. María José Villanueva, WWF Mexico's director, highlighted this achievement, telling reporters, "One of the greatest achievements of this work is that illegal logging in the core zone of the Monarch Butterfly Biosphere Reserve has been virtually eradicated since 2008. This means that the forests that represent the fundamental habitat for the monarch butterfly's hibernation are being protected and conserved." While the recent population increase is encouraging, ongoing vigilance and international cooperation remain crucial to ensure the long-term survival of this iconic species.
