OMAHA — The Omaha zoo has euthanized one of its white rhinos.
Officials at the Henry Doorly Zoo and Aquarium said Tuesday that the 21-year-old rhino, Marina, was euthanized Monday after surgeons discovered an inoperable colonic obstruction. She was being treated for symptoms similar to colic when staffers noticed that she appeared lethargic.
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The 4,000-pound rhino arrived at the zoo in 1999. Her death leaves the zoo with another female and a male.
White rhinos are listed as near threatened by the International Union for Conservation of Nature's Red List. In the wild most of them live in South Africa.