A horn flute a relatively common product of native craftsmanship, which doesn't get removed after the expedition.

A flute can be played on (by left-clicking in the inventory bar) allowing player to choose a region on the map, near the party's location. Doing so will put any animal in the effect radius to sleep (regardless of whether or not it's aggroed), allowing the expedition to escape without a fight.

A flute can be acquired by: