We live on a acreage, not really urban, but not really rural either. My neighbor puts out corn for the wild turkeys that roam this area, but it is in a small feeder almost at ground level. The other day, I saw a Mallard hen and an drake swoop in and partake of the corn. I have seen them several times since; and recently a couple of geese landed and did the same thing. I am still amazed; how do they know that there are goodies in that one little area about one yard square? Any thoughts?