Dragons do not exist, let alone bearded dragons. Dragons arose out of mythology from the far parts of China and Europe thousands of years ago.
Eastern bearded dragon
European dragons are legendary creatures in folklore and mythology among the overlapping cultures of Europe.
In European folklore, a dragon is a serpentine legendary creature with two pairs of lizard-type legs and bat-type wings growing from its back. A dragon-like creature with two legs (sometimes none) is known as a wyvern.
Dungeons & Dragons
The eastern bearded dragon (Pogona barbata) is an agamid lizard found in wooded parts of Australia. It is one of a group of species known commonly as bearded dragons. Other common names for this species include Jew lizard and frilly lizard, the latter being a confusion between this and another dragon, the frill-necked lizard (Chlamydosaurus kingii).
It is most common in eastern Australia south of Cape York Peninsula, but specimens have been collected from Cape York, through central Australia, and even from the west coast of Australia. It is a large species of grey-black colour distinguished from its relative, the central bearded dragon, Pogona vitticeps, by its less robust body and the row of spines along the lateral edge of the body, which continues over the forearm. It tends to be more cryptic in its behaviour than the central bearded dragon, and performs its bearded display more often. It has an adult snout-tail length of about 60 cm (24 in). When threatened, in addition to its beard display, it gapes to display the bright yellow colour of the inside of its mouth. It eats small lizards and snakes, flowers, insects, fruits, and berries.
Reptiles of Australia
Dungeons & Dragons (abbreviated as D&D or DnD) is a fantasy role-playing game (RPG) originally designed by Gary Gygax and Dave Arneson, and first published in 1974 by Tactical Studies Rules, Inc. (TSR). The game has been published by Wizards of the Coast since 1997. It was derived from miniature wargames with a variation of the Chainmail game serving as the initial rule system. D&D's publication is widely regarded as the beginning of modern role-playing games and the role-playing game industry.
D&D departs from traditional wargaming and assigns each player a specific character to play instead of a military formation. These characters embark upon imaginary adventures within a fantasy setting. A Dungeon Master serves as the game's referee and storyteller, while also maintaining the setting in which the adventures occur and playing the role of the inhabitants. The characters form a party that interacts with the setting's inhabitants (and each other). Together they solve dilemmas, engage in battles and gather treasure and knowledge. In the process the characters earn experience points to become increasingly powerful over a series of sessions.
The reptiles of Australia are a diverse group of animals, widely distributed across the continent. Three of the four orders of reptiles are native to Australia: Testudines, Squamata and Crocodilia. The only missing extant order is Sphenodontia, containing the tuataras, which are endemic to New Zealand. Australia has a large diversity of reptiles, with over 860 species. This is rich in comparison to other continents. For example, North America has approximately 280 species of reptile. The most diverse group is Squamata, also known as the snakes and lizards. The snakes and lizards are especially diverse in the arid areas of Australia, where diversity of other fauna is generally low. Spinifex grass is a major habitat which allows them to remain in a relatively cool, moist area.
Australia has a large array of reptiles which can be dangerous to humans. The world's largest reptile, the saltwater crocodile (Crocodylus porosus), is native to Australia.