Too often, birders remove feeders long before they should, leaving birds one more food source short as winter approaches. I urge you to keep your feeders filled and fresh, even if you don't see the birds as often or if your favorite species seem to have vanished. They are around, even if they visit less or are more unseen, and different foods in a ready supply will be very welcome. Once they realize they can continue to count on you for a tasty meal, they may return even more frequently, as noted by the jays that have visited much more often in the last day or two - always picking clean the peanut dish I'm keeping filled.
Granted, many birds migrate and you won't see them again until spring, but in the meantime, why not share your backyard buffet with their winter cousins? Keep those feeders filled!