Maybe first try to establish them in a nearby park and the overflow may come. If you already have them around I would think a season or two. I am in a smaller lot suburb in Philly area and have been successful with tree swallows but never had bluebirds nest. I have had them come and go here in the off season and dearly spring and one year had a pair seemingly ready to nest but a neighborhood cat scared them away I think. I concentrate on keeping a friendly habitat and eliminating house sparrows. Those being around could also be a deterrent in a suburb.
Thanks so much! I’ve been looking a trap for sparrows and will probably get one soon.
I’ll keep my fingers crossed, I’m getting more live meal worms tomorrow so I’ll keep feeding the small birds anyway. Take care
Ok so I’ve gone all out!! I have lots of house sparrows. So I ordered a sparrow trap. I haven’t caught any sparrows but 6/6 wrens in the first week. Hopefully by next spring I’ll be ready for the blue birds.