I suppose mid-flight is out of the question, but it appears that ducks can sleep just about anywhere else.
Floating on the icy water, they simply tuck their bills under their wings and grab a few winks while their friends keep an eye open for predators.
I wondered why they park their bills under their wings, since it doesn't cover their eyes to keep out the sunlight and I can't imagine it has anything to do with keeping warm as they float on icy water.
Maybe it just keeps their heads from drooping and falling into the drink. That would be a rude awakening.
Some climbed right up onto the ice ledge and took a nap there.
They had to be pretty tired, after a long migratory flight, so I suppose sleeping anywhere is a handy skill.
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