In America, we have the Department of Natural Resources. I'm not sure what that would be in Canada or even if that's what you did as a naturalist, but they have lots of different types of jobs. Teaching isn't for you, but what about camps or even classes teaching people how to track and whatnot? Or even a park ranger or something like that.
Or in the meantime, since you have been a teacher, maybe being a tutor online would be okay for you since you could stay in the comfort of your own home.