A 2025 Science study shows a 22% decline in U.S. butterfly populations between 2000 and 2020. A comprehensive Xerces Society report indicates that 72% of studied species have experienced population drops, with species such as the Florida white and Hermes copper facing severe declines. Further information on conservation efforts is available at Xerces Society .
State of the Butterflies in the United States - Xerces Society dela_butterflies
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