Shouldn't Canadian Geese Live in Canada?

I thought I was going for a relaxing bike ride on the towpath, and in some respects it was-- I saw lots of wildlife: a muskrat, a scarlet tanager, several goldfinches, a heron, and some turtles-- but also had a run in with several Canadian geese, their chicks have just hatched and their nests are right on the side of the path, so the adults-- in order to protect their young-- would block the path when I approached, and so I had to whip stones at them and shove my bike at them and hit them with sticks in order to get them out of the way . . . I saw one jogger do an about face and head back the way she came, her pleasant run truncated by an ornery bird.