Roundwood duck house?

I've got sticks / limbs / logs from a cherry tree that came down recently, and I need to build a new duck house. I figure people here might have done stuff like that before? I'm envisioning something kind of like a square wattle fence pen, with a roof.

Our coldest winters get to about 15F, so temperature isn't a huge concern. It should be predator proof, though. I'm not sure how I could prevent rats and etc from chewing through the walls, or if that would simply not be an issue. Thanks for any thoughts!