Please clean your houses after each brood has left. Old nesting material left on the ground could invite predators. Let dry completely before remounting. This will prevent parasites or diseases from spreading. Robins, Phoebes and Swallows prefer nesting shelves.
Many birds feed heavily during nesting periods.
Check out the bird house building books we have available. Putting out concentrated stashes of nesting materials will reduce the birds' time to find them and construct a nest. Consider creating a mud hole if you would like to attract these nesting wild birds.