We have big timber rattlers, pretty elusive though, not many sightings, one guy was bit in our town a few yrs ago weedwacking around his summer home bordering state forest. Saw pics of another that was mounted, huge, not something I'd want to find behind my house.
I was just looking up Massasauga's, swamp rattlers (Chippewa (Ojibwa to you Canadians) language, "massasauga" translates to "great river-mouth" and probably refers to the snake's preference for wet habitats, including riverine bottomlands.),
had a couple water snakes that wouldn't leave us alone bullhead fishing at night last weekend, freaked us out, I was for sure copperheads, we have them in NY but not around here it turns out, never saw anything like it, all water snakes I've saw were more black, mostly huge ones, turns out water snakes look like Massasaauga when smaller, we have them in NY but only in a couple really small areas now not near here, so we were freaked out scared of a couple harmless water snakes....Lol!