San Diego Zoo's Northern White Rhino dies

FILE - This Dec. 31, 2014 file photo shows Nola, a northern white rhinoceros, in her enclosure at the San Diego Zoo Safari Park in Escondido, Calif. The Los Angeles Times reports that Zoo officials say Nola, 41, was euthanized early Sunday, Nov. 22, 2015 as she was suffering from a number of old-age ailments, including arthritis, and had also been treated for a recurring abscess on her hip. The rhino had been a draw at the Safari Park since 1986.(AP Photo/Lenny Ignelzi, File)

With the death of Nola, only three Northern White Rhinos remain in the world. What is the plan to prevent an extinction of the species?

One of the last four Northern White Rhinos in the world died on Sunday.

The rhino, named Nola, had lived at the San Diego Zoo for most of her life in the hopes of preserving her species. With her dead, that leaves only three Northern White Rhinos left, all of them in Kenya.

Rick Schwartz, a zookeeper for the San Diego Zoo, joined us to tell us more about Nola and where their conservation efforts go from here.

Click the player above to hear the entire conversation.