Tim found this one this afternoon. It fed for a bit, disappeared, and then reappeared not long after I got there with the kids in tow. It was pretty tame.
It fed actively, frequently investigating spawn bags that had fallen off fishing lures.
The black (instead of gray) tertials (the white-edged black feathers over the primaries) indicate it's a first fall bird.
Red-necked Phalarope has a considerably thinner bill and is about half the bulk of Red which can be useful if comparison birds are about, or the bird is in a very familiar setting. Some Reds will have a noticeable pale base to the lower bill, though this one doesn't. Red-necked should have some back striping/contrast but I don't have any pics of winter Red-necks though to show the difference. There are a few retained dark juvenile coverts which could lead to some sense of streaking in this bird.