In the mediaeval period there was no real percieved difference between real and mythical animals, after all, much of the world remained unknown and who was to say what strange and magical creatures existed in distant lands? A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P191 The tiger is an interesting example here being named after a real animal but depicted in rather and mythical appearance. A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Tiger Later arms came to use a more lifelike appearance and the usage of heraldic tiger and natual tiger arose to make the distinction. Wade tells us that the mythical bearing of such a creature signifies “great fierceness and valour when enraged” and suggests that we should be wary as the holder may be “one whosee resentment will be dangerous if aroused”! The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P63