Feeders should have a platform underneath the entrance hole so that food can be placed on the platform while the bluebird is learning to go inside the feeder to eat. Bluebird feeders were designed to make it harder for other species of birds to reach the food. Any bird that is the size or smaller than a bluebird could potentially fit into the feeder. Sometimes it takes putting food on a tray close to the bluebird feeder before the bluebirds catch on. It takes two to five days for female to complete nest.
Females build the nest alone.
Males will carry nesting material during courtship. Nests are light and airy, consisting of fine grass or pine needles, hair and maybe a few feathers, with a small cup shape in the center. Possible parasites are blowfly larvae which can seriously weaken nestlings. Diatomaceous Earth can be placed under the nest. This will cause the larvae to sustain cuts which help to dehydrate their bodies.