Aristotle's De Animalibus was an important source of zoological knowledge for the ancient Greeks and for medieval Arabs and Europeans. In the thirteenth century, the work was twice translated into Latin. One translation was produced directly from the Greek by William of Moerbeke. An earlier translation, made available as a critical edition in the present volume for the first time, was produced through an intermediary Arabic translation (Kitāb al-Ḥayawān) by Michael Scot (1175 - c. 1232). Scot's translation was one of the main sources of knowledge on animals in Europe and widely used...