The brown recluse spider..
definitely seems to know what its background color is, because I've never found them in environments that weren't dark brown, or at least brownish leaves and wood trash. The funny part is they act like they are blind the way they react to stimuli, but then they have an odd defensive act that includes playing "opossum".- they do have eyes, however, and they know how to use them. I got a bite from one that simply made a home in my work boots, then waited until I got to work to bite me. It felt just like a mosquito bite despite the fact that I discovered the whole pack averaged individually larger than a silver dollar in diameter - when measuring their leg extent. There were at least three other individuals in my apartment when I went hunting for them. I found it was better to lay a trap with water in a bottle cap. They have to drink sometime!
That apartment had dark brown rug throughout. When I was a kid, we were constantly trying to rid the farm house of them, because we had dark brown wood flooring. In houses in similar surroundings, we never saw them in evidence when the floor was bright colored. Despite the fact that I have always had a clean house, and even my great aunt - we both had brown floors and would occasionally have to rid ourselves of the pesky critters!
Biting the hand that feeds IT
