Flappy Duck is a food for the ray and above. They do not move, and they have no amount of health. Every time a player eats more than one within 4 seconds, they get a flappy combo, whitch is better than just one.
They are very common, and appear in lines up to 20, making large combos easy to get. They might be a reference to the flappy bird game.
Pelicans cannot eat Flappy Ducks.