orange billed duck

by Cheryl Shine
(Houston)

About 4 years ago some brown ducks with orange bills and orange feet came and nested in my tree. I had never seen them before. They come back every year and now there are about 30 of them. I can't find them in any book. They don't quack they squeak at eack other. They have a white strip on their wings. And are very loud. I would like to make nesting places for them but I have no idea what they like; they fight over my one hole in my tree.