One of our mallard hens has laid a large clutch of eggs, somewhere around 10 to 12, right next to the house, and is setting on them. She'll head down to the pond for brief stretches, but she's definitely sticking with it. As we can best figure, she's been on the nest for about 4 or 5 days, which means these will be in late October. I always thought they would go broody in springtime, so is this unusual? Of course, we'll see how many actually hatch, and then I am worried about the cold temps that the ducklings will soon face here in PA. Any thoughts?