Deer cannot see colors like people can. I've read that it has something to do with the number of cones and rods in the eye.....I'm not sure of the technical jargon, but I can assure you they cannot see blaze orange. I rarely hunt from treestands any more. Recently I was on the ground and had a complete blaze orange vest on (required by law here). I had two bucks and a doe and two fawns walk within 12 yards of me. I didn't even blink and they never saw me. I've had this happen many times before. Being motionless is the key. I don't not believe in camo and do not wear it.....I did at one time, but I've had too many instances like the one I just described to make me believe camo is necessary. The camo manufacturers sure want us to believe otherwise.......but its nonsense. Camo may make the hunter feel like he is hidden, but it's a false sense of security....

And deer do not need to have 2 or their 3 senses alerted before they will bolt. Let them get one good whiff, and their gone (especially the mature bucks).