It is easy for me to see how this is possible. In low light I've seen what I was almost sure was a deer or at least an animal that was actually an inanimate feature of the landscape. Often something that even though it had been there all along it looked way different in the last few minutes of legal shooting time. When I taught hunter safety I cautioned students that there are legally blind people and color blind people out there hunting. A fair percent of the deer hunting accident victims are wearing hunter orange. You don't have to pass a vision test to get a hunting license. A flashlight is highly advisable.
