Population numbers of endangered monarch butterflies have fallen sharply at their wintering sites in Mexico, experts said Wednesday, blaming the “sobering” drop primarily on climate change and the use of pesticides. The orange, black and white-spotted insects covered 0.90 hectares (2.2 acres) of forest in the 2023-2024 season, Gloria Tavera, conservation director at the National Commission for Natural Protected Areas, said. That marked a decline of 59 percent from the previous year, she told a […]
