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The Black Hills and Wind Cave National Park

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An individual with heterochromia has two different colored eyes.  This young Mustang (Equus ferus caballus) colt has this condition.  His right eye is blue and his left eye is brown.  Even his right eyebrow is a different color from the left!  This little guy didn't stray too far from his mother very often.  Here his curiosity got the best of him and he approached very close to check us out.  Black Hills Wild Horse Sanctuary, Hot Springs, South Dakota.
Mustang Colt with Heterochromia