- "I bet it sneaked up here from Experimental Charms, they're so careless. Remember that poisonous duck?"
- —Ministry worker in 1997[src]
A poisonous duck is a creature bred at the Ministry of Magic.
When Harry Potter used a Decoy Detonator to infiltrate Dolores Umbridge's office in 1997, a group of witches and wizards believed the device escaped from the Committee on Experimental Charms's offices, and mentioned a previous episode regarding a poisonous duck.
- Harry Potter and the Deathly Hallows (Mentioned only)