I recently purchased several ducks from a woman who has a farm near by. I was told that I was getting 1 male and 2 females. I was told the crested duck was a Rouen (true) and a female (false). I was also told that the spotted brown duck is a female (true) and a Khaki Campbell (dubious). The solid brown duck was supposedly a male Khaki Campbell -- which brings us to the interesting part. The "female" Rouen grew a curled tail feather and both its head and tail turned glossy green; it is clearly a male. The "male" Khaki Campbell's curled tail feather fell off, and it has not changed color in any other way. (For the curious among you, the spotted brown duck has not changed, although she is closer in size to the Rouen than the Khaki Campbell, which is why I suspect she may also be a Rouen). If the Khaki Campbell lost its curled tail feather because it is shedding into its eclipse plumage, then why did the Rouen grow in male plumage at the same time? Also, why did the Khaki Campbell not change color? It literally just seems to have had its tail feather fall off, and that is the only way it has changed. Do I have gender bending ducks? I have included a picture, but unfortunately I do not have many pictures from before the Khaki Campbell lost 'its' tail feather. The top picture is the only one I could find that even sort of showed the Campbell's curled tail feather from before.