Weasel

The weasel is a mammal belonging to the Mustelidae family. It is related to other mammals including the otter and pine marten. The weasel is one of the Patronus forms found on the patronus quiz for Pottermore. It is also Arthur Weasley's Patronus.

Behind the Scenes
J. K. Rowling has stated that the surname Weasley is derived from the weasel -


 * "In Britain and Ireland the weasel has a bad reputation as an unfortunate, even malevolent, animal. However, since childhood I have had a great fondness for the family mustelidae; not so much malignant as maligned, in my opinion."