If doing with multiple people. The ducks do despawn when harvested, but respawn in about 5 seconds.
As a visible level 44 Paladin, approaching the final dead duck, Quacker Lemmy, inevitably proved fatal (too much aggro). But a little invisibility, courtesy of a Totem of the Great Chameleon purchased from a Broker, made all the difference.
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. Near the climbable wall to Shiculiant in Recluse Hollow.
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