They only quack when they want food or if one gets isolated from the flock, other than that they are very quiet ducks. I raised mine from ducklings and trained them to eat from my hand so they are pretty friendly and easy to catch. When I was looking at different duck breeds I considered Cayuga and Ancona and I'm glad I chose Cayuga. Mine really are the stereotypical Cayugas, Calm and Quiet. I hope this review will help people with their decision of duck breed(s).