It looks like the wind turbine was a thermal trigger. Appears that the vulture found the air disturbance of the blades attractive because the motion of the blades may be a thermal trigger..

I have flown over the Cohocton, NY wind farm many times and have never seen any large soaring birds in the vicinity.

I have thermaled with Red Tail Hawks numerous times in the area but never in the vicinity of the wind farm.

Any soaring Ornithologists amongst us?

Chuck Zabinski