I put up dual-holed boxes which is supposed to help bluebirds defend the box from sparrows. It creates an escape route so the bluebird can take the fight outside the box. I can’t prove it but I had success with them last year.
I wish I could but it’s in a public park in the burbs. Some “do-gooder” would likely let them out of the trap or steal it….or I’d get in trouble. I am a believer in the two-hole box though. It allows escape and taking the fight to the outside of the box.
This reply was modified 10 years, 2 months ago by phillyblues.
I still can’t believe it but there is a nest. I was amazed enough to see a pair hanging around. The nest had a good start the last weekend of February. It’s funny to think this time last year I wasn’t sure I’d ever see a bluebird in my neighborhood.