Those familiar with Harry Potter will have heard of the mythical grindylow, described in the JK Rowling novels as a small, horned water demon with pointed fangs. And while they might not be as well ...

Other stamps will include the Loch Ness Monster, Cornish piskies, and Beowulf and Grendel. Getty Images The Harry Potter books increased ... "The natural world is not just plants and animals ...