Meet one of my Fall Hatches. Mom is a Rouen, Dad a KC. Please ignore the photo bombing black headed drake in the front of the photo. My Rouen x KC looks to me like she has a very green bill and black wing bars. Her sister has a black bill and blue wing bars. The girl pictured above is quiet, but does quack loudly like a girl when I corner her. I think she is 13 wks old now, all my other ducks I've been able to voice sex by now. What is your take, Duck People? Any explanations please?