Snapping turtles only live in fresh or brackish water. They prefer water bodies with muddy bottoms and abundant vegetation because concealment is easier. The snapping turtle normally has a shell length ranging from 8 -18 1/2"and has a tail nearly as long as the shell. The tail has saw-toothed keels on it. The shell ranges in color from dark brown to tan and can even be black in some individuals.Snapping turtle necks, legs, and tails have a yellowish color and the head is dark in color. Snapping turtles are not social creatures. Social interactions are limited to aggressive interactions between individuals, usually males. Many individuals can be found within a small range; snapping turtle density is normally related to the amount of available food. Snapping turtles can be very vicious when removed from the water, but they become docile when placed back into the water. Snapping turtles sometimes bury themselves in mud with only their nostrils and eyes exposed. This burying behavior is used as a means of ambushing prey.Snapping turtles will eat nearly anything that they can get their jaws around. They feed on carrion, invertebrates, fish, birds, small mammals, amphibians, and a surprisingly large amount of aquatic vegetation. Snapping turtles kill other turtles by decapitation. This behavior might be territoriality towards other turtles or a very inefficient feeding behavior.
Source: Chelydra serpentina Common Snapping Turtle, Animal Diversity Web, University of Michigan Museum of Zoology