Tundra Swan

The above pictures are of a Tundra Swan. We normally have several mute swans around on a daily basis, but 2 nights ago I spotted this one. I immediately noticed the black bill. In Michigan we typically only see them when they migrate through. We are wondering why this one is here in mid July?
Haven't seen it again. Remember you can click on the pictures to see a larger version.

Oh.....in the way of an update on the turtle eggs.......everything looks fine so far. I am moving the trail camera to point it at the nest site.