Cryptozoology (from kryptos, "hidden" + zoology; literally, "study of hidden animals") is a study involving the search for animals whose existence has not been proven. This includes looking for living examples of animals that are considered extinct, animals whose existence lacks physical evidence but which appear in legends, and wild animals dramatically outside their normal geographic ranges.

Now, none of the creatures mentioned in this guide are fake. In fact, each and every one of these have been spotted in Equestria at one point or another. However, if existence has been proven for each creature, why has there never been a single piece of documentation for any of them? This is an issue that needs to be fixed.