The Gytrash is a huge, spectral hound that lives in forests.
Commentary
Notes
The Gytrash, in the form of a huge dog, horse, or mule, haunts solitary places; it is found in the folklore of Northern England.
(CS/g; reference: 
interview with Derek Proud, one of the game designers, who specifically states that JKR designed this creature for them, Queensland, Australia, Courier Mail, Oct 12, 2002)
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