I was walking near an area where I'd found killdeer nests earlier. A fair distance from me I saw a man & his dog flush a mallard out of the tall grass. This is up on a hill, not near water. I marked where the mallard had been and cautiously approached that area. Found her nest hidden deep in the tall grass. Did not disturb that area and left so she could return. This is my first mallard nest.
Mallard Duck nest (Anas platyrhynchos)