These aborable baby ducks are so sleepy one does a beakplant.
I have never seen a duck do this. They normally turn their heads to the side and tuck their beak into their neck feathers.
We've all seen kids do this when they are sleepy. The internet is filled with videos like this.
My daughter could fall sleep while eating. She once fell alseep and did a faceplant in her plate of spagetti.