It looks like a song sparrow to me, although I usually see them perched on a branch, singing their hearts out. This little one was wading in the water along the edge of the bog. They are persistent singers, according to my bird app, and even the mockingbirds are not able to imitate their song. A group of song sparrows can be called a flock, choir, or a chorus of sparrows. For good measure, here is another sparrow I spotted today, and it was perched on a branch, although it wasn’t singing.