At least I think so. I see in Sibley that they are rare here. It was on the ground in the thicket of willows where a stream enters the lake under a little wooden bridge--on right side of first lake as you face the lakes from the parking area. It was hard to get a clear view, but it had the size and shape, striped head and underparts, and pumped its rear end. It disappeared behind a culvert before long., seemingly into the ground. I wonder if it is nesting, . . .