My father who lives in Pine county, told me that he saw a mink climb a tree and enter one of his wood duck boxes this week. He said the mink was in the box for about 5 minutes before exiting. The mink returned a few hours later and reentered. Our assumption, was that the mink had killed the female, and was feeding on her or her eggs. Our plan is to install guards for next years birds. I'd be interested in hearing anyones comments on keeping mink out of wood duck houses.
Mark Palas

