This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Tyger (Heraldry)
The tyger's body is like that of the real tiger, but lacks stripes. It has the tufted tail of a lion and a thick mane along the neck like a horse. It has large jaws and a pointed or even horned snout, and its head bears little resemblance to that of any real animal except, distantly, the wolf's. A tyger proper was in medieval times said to be speckled, later red.
The tyger is an heraldic monster, described as incredibly swift and deceitful; its body is much like that of the wolf, but it has a crest of tufts on the back of its neck, and a tusk pointing down from its nose. Medieval legend asserts that to escape a pursuing tyger, one must throw a mirror before it, so that it will be entranced by its reflection.