Wind turbine manufacturer Vestas is providing specially coated red blades for a new pilot project at the 760MW Hollandse Kust West offshore wind farm, led by Dutch developer Ecowende. The initiative aims to assess whether red-colored turbine blades can help reduce bird collisions compared to standard grey blades.
The trial involves fitting one red blade on each of seven turbines to investigate whether increased visibility for birds can lead to fewer strikes. The research is being conducted in collaboration with ecological experts from Waardenburg Ecology, DHI, and Robin Radar.
“The objective of the single blade in a different colour is to create a smear, which is thought to be better visible for birds,” the project team stated.
Vestas has customized the red blades specifically for this project, which falls outside its standard product offerings. Line Kyndi Behrens, Vestas’ technical project manager for Hollandse Kust West VI, said the team evaluated various color options before selecting red.
“Initially, colors like black and fluorescent were considered, but red was ultimately chosen based on performance criteria, particularly its ability to avoid overheating and ensure blade durability,” Behrens said.
The project involves complex logistical planning due to the need to coordinate blade production, transport, and installation with limited port storage space and the scheduled turbine installation sequence, according to Ecowende.
In addition to the red blade trial, the developer is also exploring other bird protection measures such as adaptive curtailment—temporarily stopping turbines—and the creation of a designated bird corridor. These strategies form part of what Ecowende describes as an “overall ecological concept” that exceeds existing industry norms.
“Many countries now emphasize ecological considerations in project permitting,” said Behrens. “While this specific initiative is still being tested and evaluated, it’s a valuable opportunity for us to explore what’s possible and prepare for evolving regulatory and environmental expectations.”
Ecowende engineer Thomas Haex added: “By testing a wide variety of promising innovations, Ecowende aims to prove the most effective technologies. We share this knowledge to support future offshore wind projects, helping to minimize the impact on birdlife while maximizing renewable energy production—driving the energy transition in harmony with nature.”
Findings from the red blade trial are expected to inform future offshore wind developments as the sector continues to balance renewable energy goals with environmental stewardship.
