Natrix tessellata (Dice Snake) is a species of snakes in the family colubrid snakes. They are associated with freshwater habitat. They are found in the palearctic and Afrotropics.
Definition: The largest scale biogeographic division of the earth's surface based on the historic and evolutionary distribution patterns of plants and animals.
Definition: A depression caused by erosion by water or ice. Low-lying land bordered by higher ground; especially elongate, relatively large gently sloping depressions of the Earth's surface, commonly situated between two mountains or between ranges of hills or mountains, and often containing a stream with an outlet.
