This was a long cloth wind-sock attached to an ornate sculpture of an open dragon's mouth.
From the en.wikipedia.org
Fire belched from a dragon's mouth.
From the time.com
A large chandelier of glass hangs from the dragon's mouth, in reference to the Chinese symbol of a dragon disgorging flaming pearls.
From the en.wikipedia.org
While the individual blooms of dwarfs possess the desired effect of a hinged dragon's mouth, they do produce the elegant spikes as do the taller types.
From the charlotteobserver.com
The authors also dismiss the widely accepted theory that prey die from septicemia caused by toxic bacteria living in the dragon's mouth.
From the sciencedaily.com
When Siegfried draws his sword from the corpse, his hands are burned by the dragon's blood, and he instinctively puts them to his mouth.