Harry Potter fans want a Patronus quiz do-over: A mole, really?

While there are tons of online quizzes, it's rare to find one on Pottermore, J.K. Rowling's official Harry Potter site.

Previous quizzes assigned fans to wizarding houses and chose wands for them. But the quiz fans have been waiting impatiently for finally dropped on Thursday. Pottermore fans can now discover their Patronus, a ghostly animal produced as a protector.

Pottermore hinted that the quiz was imminent with spooky black-forest tweets on Wednesday, and fans quickly guessed what was coming.

The quiz itself is simple and beautiful. You swirl through the woods chasing a magical dot and occasionally stop to choose your favorite word of two or three provided, such as "sweet" and "salt." You're instructed that the quiz is timed, so choose quickly. After about a half-dozen choices, your mystical Patronus appears.

Potter fans will remember that Harry's Patronus was a stag, as was his father's, and his mother's was a doe. Harry's eventual wife Ginny Weasley had a horse, though the Harry Potter Wikia notes that "it could be possible that Ginny Weasley's Patronus could have changed from a horse to a doe, for her love for her husband." Hermione Granger has an otter, and her eventual husband, Ron Weasley, has a Jack Russell Terrier, which numerous Potter sites will point out is "known for chasing otters."

The Patronus options on the quiz are varied, but once you take the test, you can't retake it and get another. And some of them aren't as majestic as Harry's antlered stag. I landed a wild boar, my husband a mole. Rowling herself noted that most Patronus options are real animals, though a few mythical creatures are sprinkled in the mix.

Fans have been busy sharing their Patronus assignments via Twitter on Thursday with the trending hashtag #ExpectoPatronum.

The author says she wrote the quiz herself, but that because she got to take it before and after it went live, she was one of the rare few who was able to change her result. First she landed a pine marten (kind of like a weasel), and then was assigned a heron.

Other animals Pottermore fans say they've been assigned include an aardvark, a red squirrel, a dapple grey mare and many more. Some had fun with the results, many of which seem less than capable of protection (but always remember Hermione's otter!).

And Rowling even retweeted a joke Patronus based on the Cincinnati Zoo's late gorilla, who has become an internet meme since his death. (She later had to explain that no, the dead gorilla is not really a Patronus option.)