national-zoo

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21-Year-Old Lioness Euthanized at Smithsonian’s National Zoo After Health Decline

Smithsonian’s National Zoo staff euthanized Shera on Thursday after the lioness, one of the two oldest in accredited U.S. zoos, lost mobility due to muscle loss and osteoarthritis. Born in South Africa in 2004, Shera outlived the average captive lion lifespan and produced eight c…

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