I thought these articles on color spectrum vision might be applicable to how bigfoot can supposedly see in the dark. There is also such a thing as pentachromacy in butterflies and certain birds. There are no known pentachromatic humans. Soldiers who are dichromatic color blind tend to make better snipers since they can see through the camouflage and can sense movement better than their trichromatic counterparts. However, if one has an equal balance in peak receptivity of the extra cones in tetra