Bluebirds are insect eaters They rarely eat birdseed (although they will occasionally take shelled sunflower chips). 68% of their diet is made up of insects such as grasshoppers, crickets, beetles, spiders, and snails.

To further attract these birds, add their favorite food to feeders especially in spring when they have a brood to feed that consumes huge amounts of protein. They enjoy mealworms and these are readily available as live, dried, or even roasted. These can be provided in an open dish or bird feeders designed for mealworms.  They also like the fruit of native plants such as pagoda dogwood, eastern red cedar, hawthorn and mountain ash. They also love fruit- any kind of fruit, apples, raspberries, mulberries, elderberries, wild cherries and serviceberries. Plant plenty for fall ripening.

Moving Water:

Like other birds, bluebirds find moving water a magnet. A water feature whether large or small that has running water provides what birds need for bathing, playing and drinking. When we added our stream and waterfall to our pond, we paid particular attention to creating an area for birds. Since then we have been amazed at the attraction it has provided for a number of birds, and provided us with hours of delight in watching these beautiful creatures.

A man who never sees a bluebird only half lives. - Lewis Gannett
 

(printed in The Gardener's Guide to Life, Griswold Freeman)