Could you explain this to me or help me correct my problem. As the winter's progressed, I've noticed a gradual, and then a precipitous, falling-off in the number of birds we were getting. For the past week or so, I've noticed no birds at all. The feeder's always full, so I'm not sure how to explain the drop-off. First of all, don't take it personally.
Birds move from place to place in search of food.
Birds also migrate, so sudden changes at your feeder may simply be an indication that the birds have moved elsewhere to raise a family or headed south for the winter. Having said that, there are some very important things you can do to attract the birds in your area that normally come to feeders. Clean your feeders and keep fresh seed , suet and other foods available. Go look at your feeders. Hummingbird nectar can go bad in a day or two in hot weather.