I use2 wood duck calls in the flooded timber. Not sure the brand of 1 the other is a OLT that I have had for 12-15 years .
It's neat to have them come swiming up to you so you can flush them .

Never tryed one in the feild.

Will also work in the marsh , if you place 2 or so wood duck decoys next to cover.

I have used a 6-1 duck whistle more last year to make the woodduck call than the regular call ,but it takes a lot of practice.

Johnch