One tarsier species, Dian's tarsier ("Tarsius dentatus"), is listed by on the IUCN Red List as being "lower risk – conservation dependent". Horsfield's tarsier ("Cephalopachus bancanus") is listed as "lower risk – least concern". The spectral tarsier ("Tarsius spectrum") is categorized as "lower risk, not threatened". The pygmy tarsier ("Tarsius pumilus") was thought to be extinct until a family were found in 2008. The two males and single female (a fourth escaped) were captured using nets, and were radio collared to track their movements. Other tarsier species are listed as "data deficient".