Early 20th century
This spell was invented by Miranda Goshawk when she was young. Growing up as the youngest of nine sisters, she often found it difficult to get her older sisters to listen to her, and sometimes relied on this spell to silence them long enough to allow her to speak. For example, she cast it on her sister Diadema to get her to return clothing she borrowed without permission; on her sister Romilda to get her to keep out of her room when she did not want to be disturbed; and on her sister Tangwystl when she wanted to keep her quiet so that she could do her homework.
Late 20th century
Ginny Weasley was a noted practitioner of the hex, and used it to good effect on two occasions. The first use was to overpower Draco Malfoy in Dolores Umbridge's office during her tyrannical tenure as Headmistress of Hogwarts, allowing herself, her brother Ron, and their companions, Neville Longbottom, and Luna Lovegood, to escape. The second occasion was used on Zacharias Smith, who annoyed Ginny on the Hogwarts Express by asking her exactly what occurred at the Battle of the Department of Mysteries. This use garnered the attention of Horace Slughorn, who invited Ginny to take lunch with him as part of his Slug Club. Ginny may have also used this spell on her brother George, as he once mentioned her skill to Harry Potter.
Behind the scenes
- Wonderbook: Book of Spells gives players a chance to see the Bat-Bogey Hex in action, though they are not actually taught how to cast it.
- Harry Potter and the Order of the Phoenix
- Harry Potter and the Order of the Phoenix (film) (Mentioned only)
- Harry Potter and the Half-Blood Prince
- Wonderbook: Book of Spells
- J. K. Rowling's Official Site (Mentioned only)