Pick up 'a tasty basket' for yellow jackets. These baskets are strewn about the banks of the river before the waterfall. Search the general area around ( 4, 22, 159 ) Copy/waypoint 4, 22, 159. Hover your mouse over a basket to see what type it is. Examine the basket from your inventory to be given the quest.
The first turn-in of this quest enters the Quest Journal as a unique quest. However, the quest starter item can be picked up more than once, and each subsequent turn-in enters the the quest journal as an unlimited repeatable quest bearing the same name as the original.