Pahu is one of just three identified Sumatran rhinos in Indonesian Borneo, where the subpopulation of the species is believed to be functionally extinct due to decades of deforestation, poaching and, more recently, a low birthrate.

Source: https://southafricatoday.net/environment/boost-for-sumatran-rhino-ivf-plan-as-eggs-extracted-from-bornean-specimen/