It seems that a real live dragon has been caught on video flying over Truro England. (Story here.)
It seems (to my eye) to fly rather oddly, but perhaps that’s due to being filled with highly combustible gas of some sort. I suppose hydrogen is fairly likely. Do you suppose it has some sort of flint and steel mechanism in its mouth?
Question for final exam: is fire-breathing likely to be an adaptive trait of dragons? If so, in what way does it likely increase fitness? If not, are there other plausible evolutionary mechanisms that might explain its origin?