I don't know if those were planted or wild birds, but I do know they can hide under a blade of grass or so it seems. A number of years ago, my dad and I and a couple of his brothers hunted pheasants on opening day near York, PA. We were on my cousin's dairy farm and the group of 4-5 of us were walking through a harvested corn field that had been cut for silage, which leaves very little residue on the ground. Someone had a setter and it pointed, a bird rose, and was knocked down. Then the dog came back and pointed again, in almost the same spot. Dad told me to walk in and kick the bird out. I told him the dog was pointing where the bird had been. He said, No there's a bird there so I started kicking at what little cover there was. No bird. Then he said, You had him on your foot. So I kicked again and a bird rose. That was two invisible birds in one spot. I think they can hide on a golf green.
