Monarch butterflies down 26% in Mexico

The number of monarch butterflies that showed up at their winter resting grounds in central Mexico decreased by about 26% this year, and four times as many trees were lost to illegal logging, drought and other causes, making 2020 a bad year for the butterflies.

By

News

February 26, 2021 - 10:15 AM

MEXICO CITY (AP) — The number of monarch butterflies that showed up at their winter resting grounds in central Mexico decreased by about 26% this year, and four times as many trees were lost to illegal logging, drought and other causes, making 2020 a bad year for the butterflies.

The government commission for natural protected areas said the butterflies’ population covered only 5.2 acres in 2020, compared to 6.9 acres the previous year and about one-third of the 14.95 acres detected in 2018.

Because the monarchs cluster so densely in pine and fir trees, it is easier to count them by area rather than by individuals.

Related
October 2, 2020
August 16, 2019
September 16, 2015
July 21, 2015