Sparrows-vs-Bluebirds

[Benelli]

I have had a few bluebird boxes out the last few years. I see the bluebirds in the spring checking out the boxes, but the sparrows seem to always take over. I did have a pair of tree swallows nest in one of the boxes last year. Not too fond of the English immigrants (aka sparrows). Does anyone know of a way to discourage the sparrows from nesting and encourage the bluebirds? The boxes are set on the edge of an area where I planted with some white pine seedlings, about an acre or so. The grasses get tall in there, and I knock it down a few times a year between rows to benefit the seedlings. Any thoughts would be appreciated.

[Benelli]

Urban sprawl has eliminated that option over the past few years in the area of the boxes, now have a new house down range, not even a safe option with my pellet gun. I do use the practice where I can do it safely.

[Shotgun]

I have had bluebird boxes out for years and have had great success. Have not had a problem with sparrows. Suggest that you make certain hole is 1 1/2 inch diameter. I place two boxes on separate poles 5 to 15 yards apart. The tree swallows will some times replace the bluebird nests or drive them out. By placing two there's room for both and they can co-exist without problem. The nest boxes should be in the open. Don't locate them close to a tree line or shrubs. There are some good books around on bluebirds. Good luck.