Originally Posted by Lonster
Originally Posted by hopper35005
I have a bird house at my dock it is 10 feet up on a pole. I have 13 martins in it right now. They need to have a 2 inch hole at least that’s what they prefer


Really? I found this:

[Linked Image]

I use these openings on my houses and have only had two incidents of "wing entrapment" over the past 15 years. One I noticed and was able to free the martin shortly after it became entrapped, another went unnoticed while we were away and the bird entrapped died along with the babies trapped inside.

"It is the mark of an educated mind to be able to entertain a thought without accepting it"