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A wolf-killed elk carcass in Yellowstone National Park.

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Wild gray wolves wait to be released into the acclimation pen in Yellowstone National Park as part of the reintroduction program.

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A wild gray wolf waits to be released into the acclimation pen in Yellowstone National Park as part of the reintroduction program.

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A gray wolf is prepared for reintroduction into Yellowstone National Park.

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Wolf biologists in Yellowstone National Park examine a dead elk for signs of wolf predation.

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Wild gray wolf leaving the acclimation pen at Yellowstone National Park as part of the reintroduction program.

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Wild gray wolf waiting to leave the acclimation pen at Yellowstone National Park as part of the reintroduction program.

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Two wild gray wolves wait to be released into the acclimation pen in Yellowstone National Park as part of the reintroduction program.

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A captive gray wolf in an acclimation pen shortly before its release into Yellowstone National Park.

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A captive gray wolf in an acclimation pen shortly before its release into Yellowstone National Park.

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A captive gray wolf in an acclimation pen shortly before its release into Yellowstone National Park.

Photo: Julie Jensen Director of Marketing | WVC O: 866.800.7326 | D: 702.443.9249 | E: j.jensen@wvc.org

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