Overview
- The Bumblebee Conservation Trust’s analysis of long-running BeeWalk data shows sharp falls after the 2022 heatwaves, with red-tailed counts about 20% down, buff-tailed 25% down and common carder 35% down.
- Scientists say Britain’s bumblebees are built for cool weather: dense fur and powerful flight muscles make them prone to overheating when air temperatures reach about 28–32°C and their body temperatures exceed roughly 40°C.
- Drought linked to heatwaves reduces nectar and pollen in flowers, so workers bring back less food, colonies weaken and fewer new queens emerge the next spring, a pattern seen with low queen counts into March–May 2023.
- The UK has seen a run of recent heatwaves in 2026 that raise the risk of further declines, and the Trust warns that continued extreme-heat trends could produce dramatic, lasting population drops.
- Conservationists urge practical measures people can take now: create flower-rich patches, add ponds and water sources, plant dense shrubs and provide shaded corridors to boost forage and offer cooler microclimates.