sentences:  Since 19 March 2018, there are only two known rhinos of this subspecies left, 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 and are protected round-the-clock 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)."