I disagree. If you are camo' d out and NOT moving (KEY HERE IS NOT MOVING), they know nothing unless they smell you. I can' t tell you how many deer started my way upwind when I saw them first and have literally walked within feet from me. I had a deer once come across a 30 acre field just to check me out. I was froze the second I saw him coming out of the woods. He walked all the way to me, got up behind me and started pawing the ground trying to make me move - this was within five feet.

Remember too - deer see almost all the way around them, but, have no depth perception while looking straight ahead. That' s why when they look up at you in the tree, you can actually draw on them without detection because they have no depth perception. (wouldn' t reccommend testing this, but trust me, it works).