In Basque mythology, what dragon-like serpent is known as Herensuge?

In Basque mythology, Herensuge is a dragon-like serpent associated with caves, mountains, and destructive power.

Herensuge appears in Basque folklore as a huge serpentine or dragon-like being. Stories describe it as living underground or in remote natural places, and some versions give it several heads or the ability to fly. Its presence commonly signals danger to people and livestock.

The creature belongs to the rich supernatural tradition of the Basque Country, a region spanning parts of northern Spain and southwestern France. Folklore collections vary considerably, so Herensuge’s appearance and behavior are not identical in every local account.

Herensuge can be confused with Sugaar, another important Basque mythological figure. Sugaar is generally a male storm-associated spirit and companion of the goddess Mari, while Herensuge is the dragon-like serpent featured in heroic and monster tales.