Action: Close off nacelles in wind turbines to prevent roosting bats
- We found no evidence for the effects of closing off access to nacelles on wind turbines to discourage roosting bats.
'No evidence' for an action means we have not yet found any studies that directly and quantitatively tested this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.
Nacelles are the housing units at the top of wind turbines which contain the generator, electronic controls and inner workings of the turbine. They have warm, hollow spaces, and bats have been observed roosting in nacelles on offshore wind turbines in Scandinavia (Ahlén et al. 2009). Closing access to nacelles in wind turbines to prevent bats from roosting may reduce the risk of bat collisions with turbine blades.
Ahlén I., Baagøe H. J. & Bach L. (2009) Behavior of Scandinavian bats during migration and foraging at sea. Journal of Mammalogy, 90, 1318–1323.