Abstract
Like humans getting tanned after sunbath, mammals around the world may also change their coloration according to the dynamic environment. Such changes primarily aim for better camouflage, but it also comes with some linked physiological changes for mammals to potentially have better fitness. The article predicts the overall evolutionary trend of mammal coloration using case studies across different species in distinct geographical locations. The article focuses on the explanation of animal coloration mechanism and the comparison between the potential fitness of the same species of mammals with different colorations. As demonstrated by most case studies, the evolutionary trend of mammal coloration is to become darker. Such an evolutionary trend is promoted in which darker coloration brings better fitness for the mammal for the purpose of better camouflage and more adapted physiology to the environment under the influence of climate change.
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