A 33-year-old black rhinoceros housed at the Little Rock Zoo has died, officials said Monday.
The zoo said in a statement that Navasha died Sunday afternoon in its exhibit after an apparent illness caused blood in its urine; diarrhea; lethargy and a loss of appetite.
Zoo staff sedated the rhino Saturday for treatment and it appeared to be stable afterward, but its condition deteriorated Sunday, the zoo said. A necropsy revealed abnormalities in the animal's gastrointestinal tract, though the precise cause of death isn't yet known.
The zoo's other black rhino, 18-year-old Johari, is said to be "doing well." The facility is also home to a 43-year-old white rhino, Sue.
Median life expectancy is just under 18 years for black rhinos living in accredited zoos, the zoo said. Navasha had been in Little Rock since 2008.
The death comes about a week after the zoo lost Jewell, a 62-year-old elephant that had been at the zoo since 2011. Jewell was euthanized Sept. 8 after it was found on its side unable to get up on its own.