An off-duty paramedic said the collision happened just before 6 a.m. ET Thursday in the westbound lanes of Highway 417 near Boundary Road, in the rural southeast of Ottawa.
The collision "literally split the deer in half," through its midsection, said Ottawa paramedic Ian Courville, who witnessed the grisly crash while travelling to work.
The 46-year-old motorcyclist ended up some 45 metres from the site of the collision, while the bike was another 45 metres down the road, said Courville.
The motorcyclist was alert as he was taken to the trauma centre of the Civic campus of the Ottawa hospital with non-life-threatening leg injuries.