The last documented encounter was in 1907, and when in the 1920s a more extensive expedition to the island's interior was conducted, no traces of their active habitation were found; the Jangil had become extinct.
O último encontro documentado foi en 1907, e cando na década de 1920 unha expedición máis ampla explorou o interior da illa, non atopou rastros da súa civilización, dándose a os Jangil como extinguidos ((ref | AA)).