A legendary creature is an animal described in non-historical stories that sometimes involve the supernatural. Other legendary animals, such as the unicorn, were claimed in accounts of natural history by various scholars of antiquity.

The definitions of legendary and mythological have been debated with no widely agreed upon application. Some legendary creatures have their origin in traditional mythology and were believed to be real creatures, for example dragons, griffins, and unicorns. Others were based on real encounters, originating in garbled accounts of travelers' tales, such as the Vegetable Lamb of Tartary, which supposedly grew tethered to the earth (and was actually a type of fern).