It's not the camo that allows animals to miss you. It's other traditional factors that hunters for 1,000s of years have always known about: wind direction, hunter movement (even eye movement), reflections off clothing... I've had turkeys, rabbits, deer, a fox, multiple birds--including hawks and eagles--come within a couple feet while I was wearing wool alone, usually a checked wool pattern. The key though to spook wildlife seems to be movement, followed by scent carried on the wind.