- Hagrid is said to be twice the height of a human, but in the films he is mentioned to be 8 feet 6 inches.

- Crookshanks is no ordinary cat, as he is half-kneazle. Kneazles are intelligent cat-like creatures who can sniff out suspicious characters, and if a kneazle takes a liking to a witch or wizard they make excellent pets.

- Members of the Order of the Phoenix are the only wizards who know how to communicate using their patronuses.

- Dementors don't breed. They grow where there's decay, like fungus.

- The tattoos on Sirus Black's body are borrowed from Russian prison gangs. These are to identify a person as one to be feared and respected.


- Garden gnomes are considered to be pests in the wizarding community because they eat the roots of plants and make little piles of earth, very much like moles.

- The ghost Nearly-Headless Nick was beheaded because of a botched dentistry job. He was trying to straighten Lady Grieve's teeth but instead she sprouted a tusk. When his head was on the block the executioner swung his axe 45 times but still didn't completely remove it from Nick's neck.


- The secret code Arthur Weasley must dial into a telephone keypad to access the Ministry of Magic is 62442. The letters underneath those numbers on a standard phone spell out the word MAGIC.

- The original snitch used in early Quidditch matches was actually a fat bird called a snidget. When some wizards thought this to be too cruel, the wizard Bowman Wright invented the Golden Snitch.


- The infamous Weasley cousin who was cut from the books was named Mafalda. She was in Slytherin.

- Dean Thomas's father was killed by Death Eaters when he refused to join them. Neither Dean nor his mother know.

- Muggle education is not required for wizard children prior to attending Hogwarts.

- Bellatrix was sexually attracted to Voldemort, and he was always her true love, not her husband.

- It is illegal to apparate between countries, but travel by portkey is allowed if both countries give permission.

- Hagrid created Blast-Ended Skrewts.

- A picture of Gandalf the Grey can be seen in the collection of great wizards in Professor Dumbledore's study in Harry Potter and the Chamber of Secrets.


- Colors play an important role in the Harry Potter novels. For example, shades of red represent goodness, such as Gryffindor's scarlet robes, Harry's red ink, and the crimson Hogwarts Express train. The Weasleys have red hair and a red roof. Green is largely associated with negative events, such as when Harry sees a flash of green when his parents die and the green-colored curse that made Ron vomit.

- Numbers are symbolic in the series, especially 2, 3, 4, and 7. For example, the trio of Harry, Ron, and Hermione suggest the power of three and the spiritual trinity. Harry fatally wounds the basilisk on its third strike, and Hagrid knocks on the front door of Hogwarts three times. Students attend Hogwarts for seven years and there are seven players on each Quidditch team. Sirius is also imprisoned on the seventh floor of Hogwarts.

- Markus Flint, Slytherin Quidditch Captain had to repeat a year at Hogwarts.

- There were several discarded opening chapters for PS/SS, one of which had a muggle betraying the Potters.

- Harry lost the ability to speak Parseltongue when his scar Horcrux was destroyed.

- Peeves was never a living person. He is not a ghost but an indestructible spirit of chaos, who can unscrew chandeliers, throw walking sticks, and generally cause mayhem.

- Natalie McDonald, who appears on page 159 of Harry Potter and the Goblet of Fire, was a real person. She was a nine-year-old girl from Toronto, Canada, who was dying of leukemia. She wrote to Rowling asking what was going to happen in the next Harry Potter book, as she would not live long enough to read it. Rowling emailed back, but Natalie had died a day earlier. In tribute, she became a first-year student at Hogwarts named by the Sorting Hat in Gryffindor. When Rowling was later in Canada for a promotional tour she visited the McDonald family.

- Harry and Ron will never read Hogwarts, A History.

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