My mallard has made yet another nest Seems like something always gets her eggs. One other mallard had a nest but she was killed about a week before they were to hatch....I put them in an incubator and 5 hatched. Now i am worried about this other nest. She is in a good place behind a little wall where my "Mary" statue is.....any suggestions as how to block it up for her at night so no harm comes to her or the eggs????? please help!