Chincoteague Island Pony Swim

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Spectators watch as Assateague wild ponies play after they crossed the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Saltwater Cowboys drive Assateague wild ponies into the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Assateague wild ponies cross the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Young foals play in a pen on Chincoteague Island on July 25, 2017, where Assateague wild ponies are held prior to the annual Chincoteague Island Pony Swim. Every year the wild ponies are rounded up on the national wildlife refuge to be auctioned off by the Chincoteague Volunteer Fire Company. / AFP / JIM WATSON

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A young foal runs with other Assateague wild ponies during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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A Saltwater Cowboy waits on the arriving side for the annual Chincoteague Island Pony Swim to begin in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Assateague wild ponies rear up on each other during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Saltwater Cowboys parade Assateague wild ponies through the town during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Spectators reach out to pet Assateague wild ponies after they crossed the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Assateague wild ponies swim across the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Assateague wild ponies surround a young foal after crossing the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Saltwater Cowboys parade Assateague wild ponies through the town during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Assateague wild ponies swim across the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Saltwater Cowboys drive Assateague wild ponies through high grass on the r way to the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Ponies rest in a pen on Chincoteague Island, Virginia, on July 25, 2017, where Assateague wild ponies are held prior to the annual Chincoteague Island Pony Swim. Every year the wild ponies are rounded up on the national wildlife refuge to be auctioned off by the Chincoteague Volunteer Fire Company. / AFP / JIM WATSON

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Assateague wild ponies make their way out of the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 20 / AFP / JIM WATSON

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Ponies rest in a pen on Chincoteague Island, Virginia, on July 25, 2017, where Assateague wild ponies are held prior to the annual Chincoteague Island Pony Swim. Every year the wild ponies are rounded up on the national wildlife refuge to be auctioned off by the Chincoteague Volunteer Fire Company. / AFP / JIM WATSON

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Assateague wild ponies rear up on each other during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Assateague wild ponies make their way out of the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Saltwater Cowboys drive Assateague wild ponies into the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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The US Coast Guard lights off red flares to signal a slack tide and the beginning of the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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A young boy contemplates his next move as he trudges through knee deep marsh mud to view the Assateague wild ponies' arrival during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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An Assateague wild pony swims across the Assateague Channel during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017.. / AFP / JIM WATSON

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Assateague wild ponies rear up on each other during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON

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Spectators watch as Saltwater Cowboys round up Assateague wild ponies during the annual Chincoteague Island Pony Swim in Chincoteague Island, Virginia, on July 26, 2017. / AFP / JIM WATSON