Well I checked my wood duck house which is on the small pond in back of my house. Last year, after about 5 season I had my first successful nesting. When I went to the box there was some down on the outside of the hole so I was hopeful. Again like last year I never saw any baby ducks. When I opened the box I found what looks like 2 or 3 membranes but there were 6 unhatched eggs. So she did hatch a few . I opened the 6 eggs and there was no indication of any development so I guess these were never properly fertilized.