what is the average size of the most common snake
Black Rat Snake Information & Facts. Black Rat Snake Biology: In general, black rat snakes are a medium-sized snake. Their average length is between 40 to 70 inches. The widest point of the snakeâs body is usually near the tail section and the snake has an average diameter of around two inches. This length and width makes black rat snakes have a powerful and sleek body that is able to move fluidly horizontally on the ground, as well as vertically in trees.