Have you noticed Sparrows going into your Bluebird and Martin houses? If so they will drive out the

Nesting Material

Bluebirds and Martins from your nesting boxes. English Sparrows and Starlings will often attack and kill Bluebirds and Martins on a nest of eggs. Now is the time to trap and eliminate them. I recommend the use of the Songbird Essentials 2 compartment Sparrow Trap. Place it on Martin poles and other places like buildings where you want to eliminate Sparrows and Starlings. It works best if you bait the outside of the chambers with a small amount of Sparrow nesting material. You can also use popped popcorn. Keeping live Sparrows in the center compartment of the trap helps to attract more.