SAN DIEGO >> A popular white rhinoceros has been euthanized at San Diego Zoo Safari Park after a series of illnesses.

The Los Angeles Times reports that, at 41, Nola was considered geriatric and had a series of old-age ailments, including arthritis.

The rhino had also been treated for a recurring abscess on her hip.

Zoo officials say Nola was euthanized early Sunday after her condition deteriorated. The rhino had been a draw at the Safari Park since 1986.

The newspaper says Nola’s death leaves only three northern white rhinos in the world — all at a sanctuary in Kenya, protected from poachers by around-the-clock armed guards.