I live in Southern Ontario ....closer to Toronto ....and on the news this week there was an elderly woman who lives in the Hamilton area ...that was weeding her garden and was bitten by a black widow ...she ended up paralized from the neck or chest down ...and its slowly going away ....extremely painful....
The fellow from the medical lab said there common in the Windsor area on the other side of the river from Detroit ...The moral of the story ...wear gloves when gardening
I remember as a child living out west in the Okanagan Valley my Dad collecting them in Big old wine/whisky jugs in his workshop window ....