Dragons are rare living Archosaurs that eat meat and speak many languages including Dragonish the language of dragons. The study of dragons is Dragonology which was mainly guided by Dr.Drake.
Dragons write in Anglo-Saxon runes which look like this
The reason for hoarding is because most dragons have a soft under belly that is protected mainly by gems.
The Indian Naga went extinct because of a terrible plague by Alexandra Gorynytchka.
The Dodo Dragon went extinct because of passing sailors that ate there stale-tasting meat.
The Monkey Dragon went extinct because people used there thrown eggs for decoration.
Draconodon the first dragon, was hunted because man made the spear.