My Cayuga female doesn't quack a real lot, but when she does, it's LOUD. For those of you who were around in the mid/late 1960s, think of Burgess Meredith as "The Penguin" on the old "Batman" television series.
"HWA-HWA-WA-WA-WA!!!!!!"
"HWA-HWA-WA-WA-WA!!!!!!"