Butterfly populations in the United States have declined significantly since 2000, with research indicating a drop of nearly a quarter (specifically around 22%) over the past two decades. This figure comes from a comprehensive study analyzing data from over 76,000 butterfly surveys across the contiguous U.S., covering 554 species, conducted between 2000 and 2020.
The decline is attributed to a combination of factors, including habitat loss due to development and agriculture, widespread pesticide use, effects of climate change and rising temperatures with drought. These pressures have impacted butterflies nationwide, with the southwestern U.S. experiencing some of the steepest declines.
While the overall trend is alarming, some species near human development have fared better, though they are the exception rather than the rule. This consistent rate of decline (about 1 to 2% per year) mirrors broader global insect population trends, raising concerns about ecosystem health since butterflies are key pollinators and indicators of environmental change.
The Social Pie Network! 