Tarot Symbolism- Salamanders

Salamander on knight of wands in RW Deck? What do they signify?
I associate salamanders with fire element and their ability to survive in desert like conditions, knight of wands is charging through a desert. Thus ability to survive difficult conditions and use it to one's benefit, fire charges salamanders; it is source of their powers. And when one closely sees the image of salamanders on knight of wands they sort of look like serpent eating their own tail, an ouroboros, representing cycle of life and death, fire and water, sun light heating the seas and oceans resulting in rains, cycle of nature.