The quacker-oos are four duck-like birds featuring in Dr. Seuss' ABC.
Appearance[]
They are yellow birds with long necks, webbed feet, feather tufts on top, and white ruffs.
Role[]
One of them is Queen Quinella's pet, and will appear next to her, quacking if the word "quacking" is clicked.
If it is clicked, three more quacker-oos will run up and they will play music together (referred to as the "quacker blues"), prompting Queen Quinella to scold them.