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Originally Posted by Sherkugawa
My first guess is the bird house hole might be too large. Bluebirds need a specific type of house. As a modification I have seen wire cages built in front of the access that allows bluebirds in but larger birds out. Sorry for your loss!
QUOTE=Lillyangel;2330273]About 3 days before the chicks were ready to leave the nest something pulled them out of the nest, killed them, but did not eat them. Some have told me that it must have been other birds that did this. I believe this is true, but would like some info on how to protect the nesting box since there are many types of aggressive birds in my neighborhood. I am very upset about this because I never even knew that bluebirds were songbirds until the mother sang me the most beautiful song I ever heard a bird sing. After the slaughter she came back and sat on the light post across the street for 2 days. I only saw the father briefly one time after the tragedy. I am thinking that maybe I should take down the nesting box (which it just a birdhouse), since I don't know what I am doing and do not care to be an accessory to any more murders of such wonderful creatures. But then I think about how much I would like to help them expand their population.
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“ For Eastern Bluebirds, you can use a 1½ inch round hole, a 1⅜ x 2¼ inch vertical oval hole, or 1⅛ inch horizontal slot entrance. Western and Mountain Bluebirds prefer a 1 9/16 inch round opening or 1 3/16 inch slot entrance. Where the ranges of the species overlap, use the larger opening.”
Lots of instructions here:
https://www.nabluebirdsociety.org/PD...box%20Recs.pdf