It was very active and I watched with binoculars to determine that it was not a moccasin, even though it flattened its head into the characteristic triangle.
Later that same afternoon, we came upon this young diamond back rattler crossing the road, just a few miles away. It was about four years old.
As we got closer, it was almost to the grass. It turned and lifted its head in a threatening way. A car came up behind us and we moved on, and so did the snake.