Female northern white rhino Nabire dies at Czech zoo, only 4 others are now left in the world

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One of the last five northern white rhinoceros left in the world has died.

The Czech zoo in Dvur Kralove says the 31-year-old female Nabire died Monday evening due to a ruptured cyst.

Nabire was born in the zoo on Nov. 15, 1983 — a rare case of the species being born in captivity.

The zoo's director Premysl Rabas called the death "a loss hard to describe."

He said "Nabire's death has brought another animal species close to complete extinction."

Only four other northern white rhinos remain: one at San Diego Zoo and three at Kenya's Ol Pejeta Conservancy.

In 2009, the Czech zoo moved four rhinos to Kenya hoping that the natural environment there would help them breed but that plan failed.