This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Calygreyhound (Heraldic)
The calygreyhound is a mythical creature that appears on medieval heraldry. The de Vere family, who were the Earls of Oxford, used the calygreyhound in their coat of arms in the 15th and 16th centuries. The calygreyhound may be unique to the de Veres, and unlike most heraldic monsters, it made no attempt to seem realistic. A similar monster is the caretyne.
The calygreyhound is described consistently as having the head of a wildcat, the torso of a deer or antelope, the claws of an eagle on its forefeet, ox hooves, antlers or horns, the hind legs of a lion or ox, and its tail like a lion or poodle. On some rare occasions, the Calygreyhound may be seen as depicted with the wings of an eagle. It is said to represent speed or swiftness.