Females have a deeper more distinct quack lol almost sounds like they're annoyed at the world where males have the general monotone repetitive "duck quack".
female "quaaaaaaaaack quack quack" (loud)
male "quack....quack....quack"
We lost our female Rouen today :( and need a new companion for our male. I am looking for a mature sized female to get as soon as possible. She doesn't have to be a Rouen but preferably a duck of similar size. We are located in the greater Philadelphia area.