- Sep 20, 2011
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I have looked and couldn't find the answer to this exact question. I am building a community nest box that will be about 4' wide. I want to put one opening so that most of the box is nice and dark. What size should the opening be? I want to make it just big enough, but not too big so that the light is minimal. And any thoughts on putting it in the middle or the side of the front of the box?