Robert Clarkのインスタグラム(robertclarkphoto) - 10月17日 02時59分

This is a common garter #snake (Thamnophis sirtalis) it is a #species of natricine snake, which is indigenous to North America. They are identified by the a pattern of yellow stripes on a brown or green background.
#Morphology refers to the shape that the snake’s body makes in response to the environment, #predatory defense and mating. The term body geometry may also be used to describe the shape a snake's body makes and Garter snakes exhibit a higher #variation of morphology when compared to other snakes.
The Garter snakes also exhibits many different anti-predatory behaviors, or behaviors that ward off danger. Predation has been such an intense selection pressure throughout #evolution; these snakes have developed body geometries that are highly variable and heritable. The #morphologies have become highly variable even within a single population. Different geometries indicate whether the snake is preparing to flee, fight, or protect itself. Since the traits are heritable, there must be some #evolutionary benefit such as warding off predators. Additional research also shows that different #biological factors such as body temperature and sex influence whether the snake will exhibit certain anti-predatory behaviors. @thephotosociety @Robert Clark @ナショナルジオグラフィック

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