I've been hearing a lovely flute-like song early in the morning in the woods behind my office. It sounds like the song of a male American robin, suggesting that he has a good territory! Just click on song to hear his morning tune.
There have been large groups of robins here in the Garden this winter, some in mixed flocks with other birds. They vigorously eat berries, swoop down for water, and it's back to eating again.
Here's an interesting link on Journey North about winter robin behavior.
If you'd like to download a checklist for birds in the SCBG, click here, and select SCBG birds checklist.