This is the mother bluebird who lost her mate just as incubation of her eggs began. One thing that I have done is provide her with meal worms and wax worms a few times a day. She comes to the feeder when I whistle. Today I received an order of larger meal worms, which she loved.
Harold R. Spencer Bluebird Trail.
BluebirdMeal wormIowaHarold R Spencer Bluebird Trail