Startling pictures show the moment a tiny prairie dog found itself in an unlikely showdown with a colossal bison nearly 850 times its own weight.

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One image shows the cheeky burrowing rodent seemingly locked in a staring battle with its gigantic opponent.
Black-tailed prairie dogs are just 12-16 inches long and weight between one and three pounds.

American Bison, also called American Buffalo, can tower at six feet six inches high, 10 feet long, and can weigh a staggering 2,500 pounds.

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