Zoo White Rhinoceros: Northern Species at the Brink

The northern white rhinoceros is functionally extinct in the wild with only two females remaining. Zoo science is now the only hope for species recovery through assisted reproduction.

Key Facts

Only two northern white rhinos remain: Najin and Fatu at Ol Pejeta Conservancy in Kenya
Both surviving females cannot carry pregnancies, making natural reproduction impossible
Scientists have created embryos from frozen gametes of deceased northern white rhinos
Southern white rhino surrogates would carry northern white rhino embryos if IVF procedures succeed
The last northern white rhino male, Sudan, died in 2018 at age 45 after chronic health problems

Welfare Considerations

The welfare of Najin and Fatu, the last northern white rhinos, is uniquely significant — these two individuals carry the hope of an entire subspecies. Both have chronic health conditions that limit the reproductive procedures they can undergo, creating ethical tensions between their individual welfare and species preservation imperatives. Southern white rhino surrogates used in IVF procedures experience the welfare impacts of repeated hormonal stimulation and embryo transfer. The extinction of the northern white rhino as a naturally reproducing population is itself a profound welfare loss, representing an irreversible reduction in the richness of animal life on Earth.

What You Can Do

Support BioRescue project developing assisted reproduction technology for northern white rhinos
Donate to Ol Pejeta Conservancy providing care for Najin and Fatu
Learn about the role of poaching in northern white rhino extinction to understand prevention
Support southern white rhino conservation programs maintaining the surrogate population