Beautiful but deadly, the chemical responsible for the tiny phosphorescence of fireflies (genus Photinus) is responsible for reptile deaths every year. Bearded dragons are the most frequently reported victim although tree frogs may be a close second. It is thought that the lucibufagins responsible for the illumination are cardiotoxins, similar to the toxicity found in some toad and plant species. Symptoms can manifest rapidly with as little as one firefly ingested and may include difficulty breathing, gagging, tremors, and a darkening of the skin. If you think your reptile may have ingested a firefly, contact your veterinarian immediately!