The Haredee Gurdee was an exotic instrument invented by Boorab the Fool. It was essentially a one-man-band type of instrument, and consisted of drums, horns, flutes, a fiddle, and even a mandolin. It was also very heavy; Boorab once tripped while carrying it and became trapped beneath it. He later tricked two members of Skipper's crew into carrying it for him. When he got a job as Assistant Cook in Redwall Abbey, he gave the instrument to Nimbalo the Slayer, who learned to use it - though how the tiny mouse managed to lift it is a mystery.
The name may be a play on words relating to a medieval instrument called the hurdy gurdy.
Not to be confused with the Hardee Gurdee.
The Haredee Gurdee appears in Taggerung.