"Mediaeval investigators of the Nature spirits were of the opinion that the most common form of salamander was lizard-like in shape, a foot or more in length, and visible as a glowing Urodela, twisting and crawling in the in the midst of the fire. Another group was described as huge flaming giants in flowing robes, protected with the sheets of fiery armor. Certain mediaeval authorities, among them the Abbé de Villars, held that Zarathustra (Zoroaster) was the son of Vesta (believed to be the wife of Noah) and the great salamander Oromasis. Hence, from that time onward, undying fires have been maintained upon the Persian altars in honor of Zarathustra's flaming father.
Thanks Baytown Nature Center.