UK Records 1.4 Million Butterflies in Second-Best Season in 16 Years
Britain saw a major butterfly and moth surge during the exceptionally hot summer of 2026, with nearly 1.4 million individuals counted across the country. More than 100,000 volunteers participated in the nationwide count. Migratory painted ladies experienced a particularly dramatic rise, with populations up 335 percent compared to previous seasons. However, scientists caution that the same drought conditions that boosted adult butterfly numbers damaged caterpillar habitats and food sources. This raises concerns about a potential population crash among caterpillars in the coming year.
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