There are lots of people who will never see a deer in the woods, my brother being one of them. I once sat him in a stand about 500 yards from mine and could clearly see him sitting there. There were 8 does and yearlings feeding in the clearing between him and I and he never saw them.
Dead center facing the camera. Walking right to left.
This is one of many photos I use to teach my kids, they all saw this in no time, and for 10,9,8 I thought that was pretty good.
Here is the very first one I showed them, mind you that htere is 2 deer in this one.
For just a moment I was tempted to use my rangefinder. I think for it to work, however, I'd have to take my monitor outside and set it across the street (in one of the neighbor's yards) at about the approximate distance the deer is in the pic. It's presently raining ... might ruin the monitor.
Understanding wind currents and thermals in hilly, broken terrain can often be incredibly frustrating. I've found that collecting and storing milkweed seed pods during the late summer has made me a better hunter in the bluff country that I hunt. These little feather like seed dispersers will float on the lightest of air currents and will show you what the wind is not only doing right at you're location but more importantly down range. I like to use the off season to float them...