I, like many others, am trying to find a way to science-ify dragonfire. I have settled on liquid hypergolic chemical reactions for the methodology, as hydrogen, methane or ethyl just don't have enough 'oomph' to them, and most of those kinds of solutions require the dragon to eat masses of plant matter. But the problem with most extant hypergolic reactions mentioned in the other questions is that they invariably require something so weird and niche (dragons eating coal, dragons eating phosphene-containing rocks, dragons eating limestone, etc) that the geographical range of dragons would be extremely narrow. Considering just how much meat a predator the size of a dragon would need, it's infeasible to have them all huddled together in one cave so they can drink phthalic acid from some natural oil well.
Bombardier beetles, for comparison, have an enormous territorial/climate range and manage to produce the two chemicals necessary for a reaction via normal organic processes from their diet of other bugs. If they produced giant gouts of flame, I'd stop right at hydrogen peroxide and hydroquinone.
So! My question. Are there any combinations of chemicals that form a flaming hypergolic reaction that:
- Can be found or synthesized inside an animal body in a wide range of biomes/climates without major alteration of the terrain.
- Can be procured via a non-obligate (ideally, obligate) carnivorous diet?