“his snores sounded like ducks mating.”
“If it looks like a duck and sounds like a duck, it could be a really ugly swan.”
“Mandarin ducks mate for life and will die of loneliness if separated from their chosen mate.”
“Alec muttered a retort into his coffee. It rhymed with something that sounded a lot more like "ducking glass mole.”
“On the semi-frozen river below, a duck quacked insistently, sounding like a grumpy old man agruing with a cashier.”
“If it looks like a duck, quacks like a duck, it's a duck!”