Direct mortality at wind turbines is currently the greatest concern for bats in general at wind facilities EDPR has instituted a conservation program that incorporates feathering* operational wind turbines below the manufacturer's operational cut-in speed from ½ hour before sunset to ½ hour after sunrise during the fall migration period (August 1st to October 15th).

Starting in 2014, seven of EDPR's wind facilities fully feathered all wind turbines below the manufacturer's operational cut-in speed for the fall migration season.

EDPR will continue to implement this conservation plan in future years and will enhance the functionality at many sites for the 2015 season.