Where do the 'winter' birds come from in the winter and where do they go in the summer?

And why do they stop at Lake Lanier?

They stop for our fine buffet of Threadfin shad. The Golden Coral is now open.

The loons are out in mass right now. The gulls are still nowhere near where they will be this winter, but they are here. I fished the last three days and saw more gulls feeding over the loons than feeding over fish.

I believe they summer in the great lakes.