The number of monarch butterflies wintering in the mountains west of Mexico City, rebounded this year, doubling the area they covered in 2024 despite the stresses of climate change. The annual butterfly count doesn’t calculate the individual number of butterflies, but rather the number of acres they cover as they gather on tree branches in the mountain pine and fir forests. Monarchs from east of the Rocky Mountains in the United States and Canada overwinter there. Mexico’s Commission for National Protected Areas said that this year, butterflies covered 4.4 acres compared to only 2.2 acres the year before. The number of monarch butterflies wintering in the mountains west of Mexico City, rebounded this year, doubling the area they covered in 2024 despite the stresses of climate change. The annual butterfly count doesn’t calculate the individual number of butterflies, but rather the number of acres they cover as they gather on tree branches in the mountain pine and fir forests. Monarchs from east of the Rocky Mountains in the United States and Canada overwinter there. Mexico’s Commission for National Protected Areas said that this year, butterflies covered 4.4 acres compared to only 2.2 acres the year before. AP Technology and Science
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