Bats being struck by wind turbines

Bats seem to be attracted to wind turbines. Where bats occur, their mortality at windfarms is about twice as high as it is for birds. On these infrared videos taken at night, one can see bats being struck by the blades.

A bat is struck on the downswing of a blade.
 
A bat is struck by a rotating turbine blade in the lower portion of the rotor-swept zone. 
A bat is struck by a rotating blade from below as the blade swings upward.

 

A bat is struck by a fast-moving blade.