My WD nest extends about 20" deeper from the bottom of the 3"high X 4"wide opening. It would take some Long-Front-Legged coons to reach the eggs or ducklings(maybe a reverse/kangaroo mutation).
Originally, the WD nest was attached to a young pine tree at the very top reach of my front-end loader on the tractor. It was probably close to 18' up 5 years ago. In other words, the nesting birds have to do spring cleanup themselves....
Another reason to put on a free standing pole.
On the bright side, the returning ducks get a new view from a higher perspective every year.
