I received a reminder from the National Wildlife Federation (my old employer) to make sure that I'm feeding the birds.
According to NWF, March is the hardest month for birds. Their natural foods of seeds, fruits, berries, insect eggs and larvae is at the lowest level all year and March is too early for a new crop.
If you are not already feeding the birds, March is the best time to start! Birds will come more readily to feeders now than at any other time of the year. It is interesting that our natural inclination is to start really putting out more seed in the fall when their natural food is at a year-time high.