In Japan they are called tatsu, they've been called a drive of dragons or a flight of dragons (when flying), or a wing of dragons (when fighting), or a clan of dragons or finally, and my favorite, a rage of dragons!
"His [Smaug's] rage passes description--the sort of rage that is only seen when rich folk that have more than they can enjoy suddenly lose something that they have long had but have never before used or wanted."
dragons are past imaginary animals that were believed in Asia dragons were more like myths used as legends which don't exist which very little believe in dragons Hey! I just happen to strongly believe in them and so does at least three other humans I know!! Please do not insult them.