OPP Commissioner Vince Hawkes says Const. Peter Tucker from the Niagara detachment lost control of his motorcycle after hitting the bird that came into the bike's path in what Hawkes calls a "fluke accident."
Tucker — who was airlifted to a hospital in Toronto — was taking part in an escort training exercise involving 14 other motorcycles.
Hawkes says most of Tucker's injuries are to his legs and while he is stable, it will be "a long recovery."
Tucker was wearing a vest and helmet that helped prevent other injuries.
No other officers were affected by the collision with the goose.
Highway 11 was closed in both directions around the scene of the crash and the southbound Highway 400 was also closed in that area but traffic was re-routed around the closures.
Premier Kathleen Wynne spoke about the incident, saying her thoughts are with the officer.
"I hope that the officer is able to recover completely," said Wynne.
Note to readers: This is a corrected story. A previous version had a wrong first name for the officer.