ENVIRONMENT

Monarch Butterfly Population In Mexico Drops By More Than A Quarter

Monarch butterflies migrating to Mexico's forests for the winter are down by 26% since last year.

The population of monarch butterflies that arrived in Mexico’s forests to hibernate this winter fell by 26 percent from the year before, the country’s Commission for National Protected Areas and the World Wildlife Fund (WWF) said on Thursday.

Millions of orange and black monarch butterflies migrate to Mexico on a 2,000-mile (3,220-km) journey each year from Canada across North America.

A monarch butterfly sits on a flower at El Rosario sanctuary, in El Rosario, in Michoacan state, Mexico on February 11, 2021.
A monarch butterfly sits on a flower at El Rosario sanctuary, in El Rosario, in Michoacan state, Mexico on February 11, 2021.

But the butterflies occupied only 2.1 hectares in December 2020, compared with 2.8 hectares the previous winter season, the conservationist group WWF said in a statement.

Climate change had a “considerable impact” on the butterflies’ migration pattern, as well as the reduction in their milkweed breeding habitant in the United States, the WWF said.

Mexico’s western state of Michoacan is home to the country’s largest monarch butterfly reserve, typically a major tourist attraction. Visitors to the reserve have plummeted during the pandemic, sanctuary officials said.