Four Sumatran tiger cubs have been born at the Oklahoma City Zoo.
The cubs are the first of their kind born at the zoo, and they're some of the rarest tigers in the world.
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Officials waited three months to announce the birth of the tiger cubs because they didn't want to tell the public until the animals were outside on display, said Alan Varsik, assistant zoo director.
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They were born July 9 and are the first for mother, Suriya, and father, Raguno. The cubs now weigh about 30 pounds each.
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Only 71 Sumatran tigers live in captivity in North American zoos, and about 230 live in the wild, according to the Tiger Species Survival Plan, a nationwide breeding strategy designed to keep the captive tiger population healthy and genetically diverse.
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