Most of the time, when a species goes extinct, it happens in the solitude without fanfare or a goodbye. Not for George, the last known survivor of a species of Hawaiian brown snail.
When he died earlier this year at age 14, it was after years of loving care by the Hawaii Invertebrate Programme that spent many years looking for a mate for him to save his species.
Wildlife biologist David Sischo tells us about George and how one snail sends a very big warning about the extinction crisis.