Participant Photo: Mystery bird: Robin-like, with strange throat marks and coloration.

This bird is shaped and behaves like an American Robin. But it has these strange, very distinct, symmetrical throat markings on a white background that don’t seem to be leucism. The breast is dark gray with a rufous wash over it. By zooming into the image, a few darker spots can be seen on the breast, barely visible in the dark gray feathers, like juvenile Robins would have. It often appears with a group of Robins. It scratches in the mulch, bathes in our waterfall pools, and sits on tree branches. I looked through all the Thrush images in Macauley Library and can’t find one that has these markings. Has anyone seen this before?