From the link provided by
SAS.
The impact of the bird on the canopy just above the windshield near the engine control quadrant likely jarred the fire extinguisher T-handles out of their detents and moved them aft, pushing both ECL triggers out of their stops and allowing them to move aft and into or near the flight-idle position, reducing fuel to both engines. A similar incident occurred on November 13, 1999, in West Palm Beach, Florida, when a bird struck the windshield of an S-76C+ helicopter, N276TH, operated by Palm Beach County. The bird did not penetrate the laminated glass windshield, but the impact force of the bird cracked the windshield and dislodged the fire extinguisher T-handles out of their detents; however, in that case, the force was not great enough to move the ECLs
Our 76 operation likewise had a bird impact just in front of the engine control quadrant, knocked the fire handles out of the detent which meant they lost both generators and the stabilisation system. Bird then went up into the rotor whereupon a blade threw the carcass down through the cabin roof onto the passengers laps. Crew didn't wear helmets but I always wondered what the result may have been if we had the plastic windscreens, we were blessed with glass fortunately. Don't know type of bird but wedge tail eagles, pelicans and ibis were aplenty.