Egg Shells

A lesser-known way to attract birds is by putting out eggshells. Female birds, drained of calcium by egg-laying, eagerly consume them.
I save and rinse our eggshells, then let them air dry. I put them into a zip lock bag after they dry and crush them up. Add them to your birdseed or spread them on a platform feeder, patch of bare ground, or even a rock. Watch the birds, they love them!