Prairie dogs have complex calls that signal the type, size, and speed of an approaching predator.

Prairie dogs have a high-pitched, bark-like call. Recent studies suggest that prairie dogs possess the most sophisticated of all natural animal languages. They apparently issue different sounds identifying various predators, which include hawks, owls, eagles, ravens, coyotes, badgers, ferrets and snakes. Prairie dogs can run up to 35 miles per hour for short distances. The prairie dog has only one defense that works -- raising the alarm and disappearing quickly.

Prairie dogs are the most social members of the squirrel family and are closely related to ground squirrels, chipmunks and marmots. There are five species of prairie dogs.

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