That wears a nest of robins in its hair

I have a robin that sits atop my bird feeder every day sunning herself. It is the fattest robin I have ever seen. If it gets any fatter, it will have to take the bus instead of flying to its nest. This momma is fat, happy and ready for the kids to come. The problem is that her girth may make that nest crash to the ground. I will try to get a picture but she is very camera shy. The minute she sees me lurking at the window, she politely poos and then flies off. But I will continue with my efforts to document the ROBINZILLA.