Many books and websites that discuss animal wisdom have Snakes, Lizards, Frogs, and Turtles listed as one animal each. However, the individuals in each group are widespread in their characteristics and habits. A Rat Snake is different in temperament from a Cobra. The Lizard species encompasses tiny Geckos, huge Komodo Dragons, and fierce Horned Lizards. Turtles range from the quiet Box Turtle to the rapacious Snapping Turtle.
Since some characteristics pertain to the entire species, one can offer some generalizations about the group, for example, such as Snakes have no legs or that Turtles have shells. However, bear in mind what most members of each group may have in common, some animals will not. Therefore it is wise to learn about both the family and the individual.