photo by @joelsartore | An Eastern collared lizard at the @stlzoo. In #Oklahoma, these reptiles are called “mountain boomers.” Legend has it that during the Gold Rush, people thought the sound of wind blowing through the canyons was the sound of these lizards (they actually don't make a sound.) #Follow me, @joelsartore, to see more incredible animals! #joelsartore #photooftheday by natgeo

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