The Bonnacon’s Unusual Defense
The beast described in medieval bestiaries is usually identified as the bonnacon: a bull-like animal whose horns curled inward, making them poor weapons. In the story, it escaped attackers by spraying dung behind itself. The waste was said to be so hot or corrosive that it could burn those who pursued it.
The detail turns an apparent weakness into a defense. Unable to charge effectively with its horns, the animal could still drive off a hunter from a distance. Medieval accounts varied in how they described the dung’s effects, so “flaming” and “acidic” capture the tale’s extravagant danger rather than a consistent scientific explanation.
From Natural History to Moral Lesson
The bonnacon was not simply a monster in a story. It belonged to the bestiary tradition: illustrated books that described animals—real and imagined—and often used their supposed traits to teach religious or moral lessons. Bestiaries drew on older accounts of animals as well as inherited marvels, presenting them in a world where a creature’s behavior could carry symbolic meaning.
That mixture helps explain the bonnacon’s memorable defense. The animal’s body becomes a kind of weapon, and its oddness is the point: a reader could encounter a vivid marvel while also being invited to look for a lesson beyond the literal description. The beast’s most famous weapon was, improbably, the very thing it left behind as it fled.
