"A large and smelly type of rat."
Folio Bruti on the plague rat[src]

The plague rat is a species of rat, with a poisonous bite that can spread plague to human beings. Plague rats have dark[1] or greenish fur.[2] The plague rat is most resistant to the Incendio, Diffindo and Glacius spells, but it is vulnerable to most other spells, particularly Vermillious.


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