Only two foals have been documented so far this year on the Shackleford Banks, in part because there are lots of places where the "critically threatened breed" of wild horses can hide on the southern Outer Banks island.

A rare moment of one of the two found at play was captured May 15 by a National Park Service volunteer at Cape Lookout National Seashore and posted on Facebook.

The 20-second video, taken with a telephoto lens, shows the bucking colt racing around its mother, which is trying her best to eat in peace. It has been viewed 30,000 and shared nearly 900 times in 24 hours.

"His mother is keeping an eye on him and turns her head to keep him in sight, but is more interested in eating the new spring grass," the park service wrote with the video.

Karen Duggan, acting chief of interpretation at Cape Lookout, told the Charlotte Observer that capturing scenes of the foals at play is tough, because they are wary of humans.

"Had the volunteer who took the video not used a telephoto and tried to get closer, the foal would have stopped his play and Mom would have undoubtedly gone into protective mode," Duggan told the Observer.