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Black Blade Cuts Bird Deaths by 70%
19 Jul
Summary
- Painting one blade black reduced bird deaths by over 70%.
- The innovation addresses motion smear making blades hard to see.
- Testing is ongoing globally to replicate successful results.
A groundbreaking experiment at Norway's Smøla wind farm has shown that painting a single wind turbine blade black can significantly reduce bird collisions. Researchers observed that this simple change led to a decrease in bird fatalities by more than 70% compared to turbines with unpainted blades.
The strategy aims to combat the 'motion smear' effect, where rapidly spinning white blades blur into an indistinguishable disc, making them hard for birds to track. By increasing contrast with one black blade, the turbine becomes more visible, allowing birds more time to alter their course.
This cost-effective approach is now being evaluated internationally, with trials planned or underway in Europe and the United States. Scientists are also assessing practical implications, such as heat absorption and maintenance, before widespread adoption is recommended.
While further long-term testing is necessary, the success at Smøla offers a promising, inexpensive solution for mitigating wildlife impacts as wind energy continues to expand globally.
