Nah, you'd know them - we have herons and egrets here, and sandhill cranes still stand out quite a bit. There was an intensive in-state program, and outside isolated spots, they are only in Canada and then a swoosh down to Wisconsin through the UP and covering a chunk of N MN. Just haven't heard that they're out there in numbers yet, but I'd guess it'll be soon:
They're 4 ft+ tall and make a really weird call. Very dinosaur-like. Looks like some are summering west of Detroit, too.
Side note: hear about those fools going over the waterfall in MN near the border? Yesterday, I think.