Can be knocked out and then be taken wherever needed by shooting it with a grappling hook. Take it where you want it, let it wake up, start feeding. Also can be taken into a 1x1 trap if youd like to keep it safe and in the same spot. Can fit through a door so no doors allowed.
Tame to this kill fish and drag there body to it and once tamed if you feed them more dead fish corpses it will build up and lay a golden egg which is used as a buff to certain dinos or oil or a player buff
Use a horse to lasso it, then you can move it around to new fish spawns when the area gets cleared. The horse can also step on the duck to pin it down, or simply use the lasso to keep it close while tribemates gather fish.