Fire-breathing is unknown in the animal kingdom, but is theoretically possible.While wingless dragons wouldn't fly in the strict sense of the term, they could glide long distances without violating any laws of physics.Flying "dragons" exist today and in the fossil record.However, it's just as likely an organism that shoots fire might do so from its anus or a specialized structure in its mouth. It hasn't been observed, but that doesn't mean no species has ever developed the ability. So, breathing fire is certainly possible. Examples include tooth enamel and dentin, dry bone, and tendons. Piezoelectric materials, like flammable chemicals, already exist in animals.
Mechanical ignition could be as simple as generating a spark by crushing together piezoelectric crystals. Catalases improve the efficiency of chemical reactions.Ī dragon could store the necessary chemicals until it's time to use them, forcefully expel them, and ignite them either chemically or mechanically. Methane is a flammable by-product of digestion. Hydrogen peroxide is a common metabolic by-product. Even humans inhale more oxygen than they use. When you stop to think about it, living organisms produce flammable, reactive compounds and catalysts all the time. The chemicals mix in the air and undergo an exothermic (heat-releasing) chemical reaction, essentially spraying the offender with irritating, boiling hot fluid. The bombardier beetle (family Carabidae) stores hydroquinones and hydrogen peroxide in its abdomen, which it ejects when threatened. However, it wouldn't be impossible for an animal to expel flames. To date, no fire-breathing animals have been found. Model of black and yellow Bombardier Beetle with yellow legs, cross section showing venom glands and reservoir, explosion chamber filled with red liquid with one-way valve.
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