One of my daughter's friends has ask be to built her some bird, owl and bat houses & nest. I have never done anything for bats before but got plans that recommended using exterior plywood and coloring the side dark but not using paint. I was thinking of using rough cedar plank sold for fencing and using some Ritz dye to color the interior. Any guidance would be appreciated.

She has a female horned owl with chicks(?) and wants to built her a nest. Again suggestion are appreciated.