You may not think of it at first, but depending on where you live, your bluebirds needs may include food. Here you will find out when and how to feed you bluebirds.
If you live in an area without many natural fields or trees around, it is probably a good idea to put out food for your bluebirds.
Bluebirds are not the normal seed eating birds. They prefer live food. One of the most common and most widely used food for bluebirds are mealworms. They are easy to contain, harmless to humans, and inexpensive.
A mealworm feeder is easy to make. All you need is a basin-like structure for bluebirds to come to and get the mealworms, which will be in a substance such as cornmeal or some other simular meal.
Keeping mealworms is also easy. Their diet is very simple. It requires only a grain/meal food. Some good choices are cornmeal, wheat bran, oatmeal, or chicken mash. Keep the mixture moist with an object such as a moist sponge, paper towel, etc. But, do not let it get too moist.
Keep your mealworms in a dark, bucketlike container (a bucket itself would work fine) that is around 3-8 gallons. Use a lid that blocks light but not circulation. Make sure to store the container in the dark.