I think that it's a Fox snake. They are mainly found in the prairie regions of Nebraska east to Northern Illinois and all of Wisconsin, with an isolated pocket in northern Ohio into Canada(rules!
) which is right about where you are in Toronto. When first confronted they rear their heads and necks, then hiss and strike. They can however be tamed very quickly, comparible to corns in fact. However, they are prone to ejecting a foul-smelling glandular secretion from their scent glands when initially caught. It can be kept similar to corns and feed well on mice.They need at least 3 months of hibernation at about 10-15 dgrs.(50-59 F). About 20 eggs per clutch and hatch in about 60 days. Just my 2 cents