~3 weeks after birth
Most male ducks are silent and very few ducks actually "quack." Instead, their calls may include squeaks, grunts, groans, chirps, whistles, brays, and growls. Females can also make a wide range of different noises, and they are usually more vocal than males.
It is a myth that a duck's quack won't echo. This has been conclusively disproved through different scientific acoustic tests, and was even featured as "busted" on an episode of the Discovery Channel show Mythbusters.
I dunno. Some tard threw it out there and I ran with it.
Granted, what I said wasn't compleeeeeetely bullshit, if you understand how The Elites like to lay claims to power and heritage.