In the Harry Potter book series, what breed of dragon guards the Lestranges’ vault at Gringotts?

In the Harry Potter book series, a Ukrainian Ironbelly guards the Lestranges’ vault at Gringotts.

Harry, Ron, and Hermione encounter the dragon during their break-in at Gringotts in Harry Potter and the Deathly Hallows. The creature has been kept underground for years and is trained to protect the bank’s most secure vaults. Its presence makes entry difficult, but the trio eventually uses the Imperius Curse to control the goblin Griphook, who helps them reach the vault.

The Ukrainian Ironbelly is a fictional dragon breed from the wizarding world. “Ironbelly” describes its extremely tough underside, while “Ukrainian” identifies its supposed origin. This dragon is often confused with the Hungarian Horntail, the breed Harry faces during the first task of the Triwizard Tournament in Harry Potter and the Goblet of Fire.

After escaping the vault, the dragon flies out of Gringotts carrying Harry, Ron, Hermione, and Griphook. The scene is one of the book’s major action sequences and directly advances the hunt for Voldemort’s Horcruxes.