I am making a birdhouse, Where can I find instructions for the size of entrance hole. In past years large birds have plucked the baby birds out of bird houses in my yard.
What birds are you trying to attract? Some require different sizes.
The link below lists the hole sizes and other dimensions to be considered as well.
Will you share a pic with us once it is completed? hint, hint...Pleeze....
Here is a link that might be useful: Building Bird Houses For Wrens, Bluebirds and More
Thanks so much for the information. I have a lot of small birds in my yard I am unsure what they are(wrens maybe) but as I said big birds have plucked the babies out of the houses in the past because the openings were too large. I am going to make the opening large enough for wrens and rework some of the older houses as well.