Northern white rhinoceros

Formerly found in several countries in East and Central Africa south of the Sahara, since 19 March 2018, there are only two known rhinos of this subspecies left, named Najin and Fatu,[4] both of which are female; barring the existence of unknown or misclassified male northern white rhinos elsewhere in Africa, this makes the subspecies functionally extinct.

The two female rhinos belong to the Dvůr Králové Zoo in the Czech Republic but live in the Ol Pejeta Conservancy in Kenya where they are protected by armed guards.

According to the latest International Union for Conservation of Nature (IUCN) assessment from 2020, the subspecies is considered "Critically Endangered (Possibly Extinct in the Wild).

[6] There are now only two northern white rhinos left in the world: They both belong to the Dvůr Králové Zoo in the Czech Republic, but live in Ol Pejeta Conservancy in Kenya, Africa.

[10] They arrived at the conservancy after an air and road trip on 20 December 2009,[11] along with two male northern white rhinos from the Dvůr Králové Zoo, Suni and Sudan.

[18] Since May 2010, the northern white rhino male Sudan was moved from the initial holding pens to a much larger 700-acre (2.8 km2) semiwild enclosure.

This translocation was also the subject of a special edition of the BBC's Last Chance to See, titled "Return of the Rhino",[20] presented by Stephen Fry and the zoologist Mark Carwardine.

[26][27] According to the director of the Dvůr Králové Zoo, it was possible Najin became pregnant but miscarried shortly thereafter, which resulted in pathological changes in her uterus, preventing another impregnation.

[30] In September 2019, scientists announced that they fertilized in vitro the eggs with frozen sperm taken from dead males; two of the resulting embryos were viable.

[32] In December 2020, 14 egg cells were retrieved from Fatu; eight of them were fertilised by the sperm of the dead northern white rhino Suni, resulting in two viable embryos.

[38] The last known surviving population of wild northern white rhinos was in Garamba National Park, Democratic Republic of the Congo (DRC).

[40] In January 2005, the government of the DRC approved a two-part plan for five northern white rhinos to be moved from Garamba National Park to a wildlife sanctuary in Kenya.

The second part commits the government and its international partners to increase conservation efforts in Garamba, so the northern white rhinos can be returned when it is safe again.

[43] In June 2008, it was reported that the species may have gone extinct in the wild, since there has been no sighting of these four known remaining individuals since 2006, or of their signs since 2007, despite intensive systematic ground and aerial searches in 2008.

Hoping to stimulate the rhinos' sexual appetite, the zoo decided to send them back into their natural habitat in Kenya.

[64][9] Former residents include: The San Diego Wild Animal Park provided Angalifu's semen to female rhinos at the Dvůr Králové Zoo but the insemination attempts were unsuccessful.

A northern white rhinoceros near the equator during translocation to Ol Pejeta Conservancy.
One of the northern white rhinos translocated to Ol Pejeta was living in a semiwild state.
2014 VOA report about the last three individuals
A northern white rhinoceros with an Einiosaurus -like horn at the Dvůr Králové Zoo
Timeline of known northern white rhinoceros in captivity