Thanks everybody! As usual nobody around here is very impressed
I had no idea their little tufts (I've learned more correctly they are tufted) would be so unique. I've got one with two little tufts, one with a big tuft on top and a little side tuft, and one with a huge tuft that stands straight up. I'm going to try and keep a record of the ones I keep. I have not found many photos of these little guys.
They are my first ducks, and boy were you all correct, they are soooo cute.