Bird Effigy Rock Pile?

A short walk with my son at the Pond Street Cons Land in Norfolk MA. We went there as a backup plan to the place I selected that didn't pan out. Too bad I did not know the topography or we might have taken a longer walk. Saw this:

 Can't resist a picture of Joe Waksman

 The bilateral symmetry is enough to consider this might be an effigy. "A bird?" he asks.

A few feet away:

 A nice brook, we decided. Looks a bit manipulated.