Hmmm,
The one and only birdhouse I made with my brother got painted in blue with red roof.
This was a couple years back.
And we placed it high in a pear tree in the yard.
I haven't seen a single bird in it, but dad says some birds have been checking it recently.
Could it be the position? The fact that it's "colorful" and doesn't really resemble a hollow? The design? Too big, too small ....???