A Nest in Our Front Yard

My brother, Marty, pointed out to me that there’s a big bird’s nest in one of the camellia bushes in the front yard, so, of course, I had to go investigate.  I’m no expert, but from what I’ve read, based on the construction and materials used, I think it’s a robin’s nest.  We’ve got a lot of robins around here.  The nest is made of twigs, grass, and a lot of mud, and large enough to hold a brood of big robin nestlings.  From what I’ve read, the mama shapes in the side smooth with her breast and belly, to get the shape just right and then fills the cup with soft grass and hair.  Awww… I wonder if this is an old nest or one still under construction?  I’ll have to keep an eye on it.