How to do Greeting Call and When to Use it 

I feed a pair and I just talk to them and once I played baby ducklings chirping and they freaked out and was looking for the babies, so I never did that again, But the female LOVES mealworms so I bring the worms out slowly when they come to eat and I am now able to get about 2 feet from them. But now I have another couple that keeps fighting my ducks and it's actually intense and my 5 year old cries when she sees them go at it.

That’s awesome!

there are couple companies that make the same design ... I think duck commander has one but I bought the Buck Gardner version is the 6 in one or 7 in one something like that ... you can do a drake mallard, wigeon, teal, pintail, and even a mourning dove call. it might also do quail and a hawk call too but I never tried those.

also they are dirt cheap like 6$ or less usually.

Haydel whistle