AI Insight
A comprehensive global study examined range-shift patterns in 1,758 butterfly species, representing 10% of all known butterfly species worldwide. The analysis found that 80% of species expanded their geographical ranges, 27% experienced range contractions, and 22% shifted their elevational distribution, with 79% of all documented range shifts attributed to climate change and extreme weather events. Many species exhibited multiple types of range shifts simultaneously, resulting in overlapping percentages across categories.
Why it matters
This research provides critical evidence of how climate change is actively reshaping biodiversity patterns on a global scale. Butterflies serve as important indicator species for ecosystem health, and their range shifts may signal broader ecological transformations affecting pollination networks, food webs, and agricultural systems.
Understand the Science
A global analysis of range-shift records for 1,758 butterfly species—10% of known butterfly species—found that 80% had expanded their range and that 79% of all recorded range shifts were linked to climate change and extreme weather events. The new study, published in Nature Ecology & Evolution, also reports range contractions for 27% of species, and 22% of species showed a change in elevation. Because many species exhibited multiple types of range shifts, the percentages for expansions, contractions and elevation changes are above 100%.
Source: Butterfly ranges shift worldwide amid climate change, with most species expanding their reach