Sanborn's squirrel

Sanborn's squirrel (Sciurus sanborni) is, or was, a little known tree squirrel that was described in 1944 from the skin and skeleton of a single female collected in Peru in 1941. Over the following years only a handful of specimens or observations were recorded, in the regions of Madre de Dios and northern Puno in Peru, with a single sighting in Pando department in Bolivia reported in 1992. The 2019 assessment by the International Union for Conservation of Nature describes it as endemic to Peru. In 2015 the taxon was synonymised with a subspecies of Notosciurus pucheranii, so its standing as a separate species is disputed. Its habitat is tropical dry broadleaf forest at elevations up to 570 metres. It is considered possibly rare and potentially vulnerable to deforestation, but its population trend has not been established.