What or who are they? Where do they come from? Where do these formidable creatures live? And, above all, do they want me as a snack? These, my friends, are the things that you will find out in this magical book. This indispensable vade mecum that lays before your eyes, titled De grammatica animalis, is the first zoological treatise and anthropological study ever made about "animagrams" --those formidable creatures, half fantasy, half absurd, that live in between dreams, conceptual and intellectual ideas, and the potent world of imagination. The collection of this data has been an arduous process and, in the case of some of its protagonists --let's not forget that all of them are wild creatures-- tremendously dangerous. We are in front of an extraordinary book that oscillates between art, sensibility and literature.