Owls, with their natural pest-control abilities ... with a seven-inch square opening on the front. If you’re handy, you can make a fancier entrance shape using a jigsaw—there’s no rule ...

Since fall 2017, the team has dug out 92 “starter burrows.” Owls have visited and lived in about one-third of them, she said. About 14 of the burrows have been “fully excavated” by owls ...