I don't have ducks but it sounds like u r right on the voices there. How is sweet JoJo doing?So my ducks are almost 2 months. Charlie has a loud quack and is always loud trying to be the center of attention! Jojo quacks but everything about him is soft and quiet and I guess you could say raspier! So charlie is female and jojo is male? They are still getting their adult feathers so its too early for the curly tail feather. So if I go by voice sexing, am I right? Or could they both be girls?!