A deer rarely exceeds its average life expectancy of five years of age in the wild. They are capable of living over ten years but that does not happen very often. The main reasons are natural causes such as being hunted by predators such as humans, wolves, bear and big cats. Other causes are accidents (When a deer gets hit by a car) and starvation. As a deer gets older, it is commonly accepted that they wear their teeth down. After ten years, if they make it that long, their teeth are so worn down that they will usually starve to death.

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