A variety of magical creatures are depicted in the fictional universe of Harry Potter, which is drawn from various types of media.
Magical creatures appear in the Harry Potter novels and their film adaptations, in the Fantastic Beasts film series, in other books by J. K. Rowling, and on the website of the Wizarding World media franchise.
In 2001, Rowling released Fantastic Beasts and Where to Find Them, which serves as a guidebook to the creatures described in the fictional universe.
Others are derived from sources such as Greek mythology, English and Celtic folklore, and the works of Roman historians.
One notable magizoologist is Newt Scamander, who is the author of the in-universe book Fantastic Beasts and Where to Find Them.