A new study co-authored by Binghamton University’s Eliza Grames reveals a 22% decline in U.S. butterflies since 2000, with climate change, drought, and insecticide use contributing to the loss. The study analyzed 76,000 surveys covering over 12.6 million butterflies.
The Southwest saw the steepest decline due to extreme heat and drought, while insecticides played a major role in the Midwest. Climate change may be pushing some species northward, but researchers stress multiple factors are driving the decline.
Grames suggests backyard conservation efforts—limiting pesticide use and preserving wild plants—could help populations recover. Beyond their ecological role, butterflies hold deep cultural and emotional significance, inspiring art and literature for generations.
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