Abstract

Summary In his book Serpentum et Draconum Historiae Libri Duo, the sixteenth-century Italian naturalist Ulisse Aldrovandi described and illustrated an alleged dragon that had supposedly been killed in 1572. The ?dragon? became famous and was the centrepiece of Aldrovandi's museum. The specimen, a long-necked, long-tailed, scale-covered biped with a thickened torso and a forked tongue, was unlike any currently known bipedal animal and is therefore suspicious. Even so, an explicit description of its true nature has not been published before now. Here we examine Aldrovandi's description and illustration, compare these with extant animals, and conclude that the specimen was a taxidermic hoax. It was made by attaching the forelimbs of a common toad (Bufo bufo) to a European grass snake (Natrix natrix) the midsection of which had been replaced by that of a fish. Fake dragons abounded in the museums of Renaissance Europe, but only in a few cases has the mystery of their true nature been investigated. Aldrovandi's dragon can now be added to the list of such solved zoological mysteries