Quietest, my Creve roos...although his crow is funny--it sounds the same as "Here comes the bride"...if you know what I mean? Loudest...probably my Sumatra and his is high-pitched. He also probably crows the most. Most ugly crow--my lemon blue cochin (project bird) roo...he has what I call the "smoker crow." Hubby calls it gutteral, LOL