These little Black-Bellied Plovers were flitting all around the mud flats by the beach at the Wellfleet Bay Wildlife Sanctuary  the other day. Phil and I clicked away and got a few good photographs.

And then I started to do research and am not sure what they are. I think they are juvenile Black-Bellied Plovers. Can anyone verify what they are?

Their coloring is so different from adult Black-Bellied Plovers, but they were right near each other on the mud flats. Any help would be much appreciated!