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Species information


Hair colour

Black (generally)

Native range


A fly was a type of small insect with a single pair of wings.[1] The term was applied to species belonging to the order Diptera.[1] The larval stage of the fly was known as a maggot.


Dead blowflies were used as a potion ingredient.[2] They were also fed to the Giant Purple Toads at the Magical Menagerie in Diagon Alley.[3]

Flesh flies were used to distract a spider and provoke it into smashing through hedges in the Hedge Maze of the Triwizard Tournament.[4]


Fly killed by Cormac

Cormac McLaggen catching a fly to demonstrate his quick reflexes.

While watching Sybill Trelawney teaching a Divination class during 1995–1996 school year, Dolores Umbridge remarked that she was "just a fly on the wall,"[5] a phrase used to denote an unobtrusive or unseen observer.[6]

While trying out for the position of Keeper on the Gryffindor Quidditch team during the 1996–1997 school year, Cormac McLaggen demonstrated his quick reflexes by catching a fly with his fingers.[7]

Later that same school year, Harry Potter told Minerva McGonagall and Severus Snape that Katie Bell "wouldn't hurt a fly,"[7] a saying used to indicate that someone has an exceptionally gentle nature.[8]

In 1997, after Bathilda Bagshot was killed by Nagini, her home became infested with flies.[9] Bathilda, whose dead body was occupied by Nagini, was described as smelling bad and having flies buzzing around her.[9]


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