This... Killed mallards over a dry field next to 400 acres of flooded corn this year with 6 mojos working (none are mine I don't own any) Also watched ducks in that same field peal off the decoys constantly... If your where they want to be you don't need them, if your in the vacinity they can help or hurt. I think they are most effective earlier in the season an farther north. In AR last year the kryptonite was a fully stocked jerk string. Mojos were a waste of time.