A polecat is an animal that belongs to the Weasel family.
At breakfast on the morning of his first Care of Magical Creatures class in September 1993, Rubeus Hagrid entered the Great Hall absentmindedly swinging a dead polecat (presumably intended to be eaten by one of the Hippogriffs that were to be the subject of the day's lesson), excited about his new teaching position.
- Harry Potter and the Prisoner of Azkaban (First appearance)
- Fantastic Beasts and Where to Find Them
- Quidditch Through the Ages (Mentioned only)
- Pottermore (Appears as a Patronus)