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Magical creatures

HBO’s Harry Potter makes most of its creatures by hand. The creature effects are supervised by John Nolan, who started as a trainee on the films, and each animal begins with research into how its real-life counterpart moves [HarryPotter.com]. The visual effects are supervised by Alexis Wajsbrot. These are the creatures of the first season seen or reported so far, with how the book describes them. The page will be updated as the episodes air.

Hedwig and the owls

The Finding Harry special, in April 2026, revealed that the series built ten animatronic owls, each with 36,000 feathers attached by hand [HarryPotter.com]. Hedwig is seen with Harry at the station, and the second teaser shows owls delivering the post at Hogwarts. It has not been said whether real owls were also used.

In the book, Hagrid buys Hedwig for Harry’s eleventh birthday at Eeylops Owl Emporium, “a beautiful snowy owl” (ch. 5), and Harry names her after a name he found in A History of Magic.

Harry and Hedwig © HBO

Scabbers

Ron’s rat is also an animatronic, and one of the models was built to bite [HarryPotter.com]. In the book, Scabbers bites Goyle on the Hogwarts Express (ch. 6). Official.

Fluffy

The three-headed dog appears in the second teaser, with Harry, Ron, Hermione and Neville screaming as they find it [HarryPotter.com]. In the book they find “a monstrous dog, a dog which filled the whole space between ceiling and floor”, with three heads, behind a locked door on the third floor (ch. 9). Fluffy belongs to Hagrid, who bought him from “a Greek chappie” (ch. 11). Official.

The mountain troll

The troll that breaks into Hogwarts on Halloween is in the second teaser, described by TheWrap as “gloriously repulsive”. In the book it is twelve feet tall, with dull grey skin, a small bald head and a huge wooden club, and it smells like old socks and a dirty public toilet (ch. 10). The teaser.

Ronan the centaur

Jake Curran has been reported as Ronan, one of the three centaurs Harry meets in the Forbidden Forest, along with Bane and Firenze (ch. 15). The film kept only Firenze [Redanian Intelligence]. No casting for Firenze or Bane has been reported. Fans.

Creatures never seen in the films

Finding Harry showed creatures that never appeared in the eight films: a Jobberknoll, Flobberworms, Fire Crabs and a Dugbog [ComicBook.com]. They all come from Fantastic Beasts and Where to Find Them, the schoolbook on Harry’s first-year list, and they are not in Philosopher’s Stone itself. Official.

Still to be seen

Nothing has been shown yet of these creatures from the book:

• Norbert, the Norwegian Ridgeback dragon that Hagrid hatches in his hut (ch. 14).
• The unicorn killed in the Forbidden Forest, whose blood shines silver on the ground (ch. 15).
• Fang, Hagrid’s “enormous black boarhound” (ch. 8).
• Trevor, Neville’s toad, lost on the train (ch. 6).
• Mrs Norris, Filch’s cat (ch. 8).
• The boa constrictor at the zoo, which talks to Harry before he accidentally sets it free (ch. 2). The zoo scenes were filmed at London Zoo: see the filming locations.

See also the new scenes, the characters and the official images.