Dear Jollibee,
!
as I know ducks are quiet in the night when they are somewhere safe. As the sun settles, my five runners go inside their coop, waiting for me to lock them up. Now, this part may sound silly, but believe me, it works: from the very first time they introduced to their house, when the sun goes down and I lock them up, I sing a lullaby. Just a short one I created for them, it is singed in a sleepy, slow tune.
(Lyrics is: goood night goood night birdies...quack, quack, quack... all the ducks going to sleep...quack, quack, quack)
Anyway, after a few weeks they connected the song with the situation that I shepherd them inside the coop. So when at time of dusk I start to sing this song, they go into their house to sleep. It's magic, and when I throw a party all the guests see how well educated ducks I have. The price is that the neighbours not just think that I'm looney but they know it for sure.
And the morning, there is a special good morning song too, from a cartoon series that my daughters really liked.
The sound is like this, first part:
(lyrics: "Oh, the little birdies.. little birdies.. little birdies.." etc., in Hungarian, also with a "quack-quack-quackquackquackquackQUAAACK" that they happily response, greeting me with loud and heartily quacks)
My ducks have a little nap at noon (or midday, we have a word for that when animals "middaying"), except that they are active all day in the garden, talking to each other but rarely quacking.