My scovy girl started doing that and leading my blind one off. Had to clip a wing before the Teo dummies got lost or hit by a carI had mallards awhile back.
Bought like 8 ducklings from a guy. All turned out to be females then I had a hell of a time finding any true mallards anywhere. Just wanted one male. Saw an ad on CL for one male "wild type" mallard. I went and grabbed him up.
Brought him home, showed him the girls. They were all pretty much grown by then as was he. I put him down and he immediately hopped into the air and fly so far off I could barely see him.
I thought oh damn he's gone but he made a huge loop and came back and landed a few feet from where he took off from. That was crazy and in a couple years I had mallards flying all over the place.