2020 was a bad year for butterflies, too.
The population of monarch butterflies that migrated to Mexico to ride out the cold winter months in the north fell 26% from a year earlier, according to a new report from the Mexican government and the Word Wildlife Fund.
Mexico’s Commission for Natural Protected Areas said the butterflies’ population occupied only 2.10 hectares in 2020, compared to 2.8 hectares a year earlier. And the monarch Biosphere Reserve in Michoacán, Mexico lost trees at a higher rate than it did in 2019.
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