Phosphorus is an element that is very reactive. When it was first discovered, with the purification of urine, the green, yellow glow given in a low light gave it the name it now holds. Phosphorescence now also hold this name too, even though the light produced by phosphorus belongs to the broader chemiluminescence. Though truly fireflies produce their light using a luciferin chemical which contains no phosphorus at all. Some luciferin chemicals do though. Fireflies were, however, the ones to give fame to Bioluminescence and Phosphorescence and the study of producing light without flame or electricity.
Sulfer Crested Cockatoos are another Australian animal. It is also the first animal in the series to have an elemental name in its common name. The yellow crest though just looks like crystallized Sulfer, though this was how the common name for the cockatoo came about. It pretty much reacts with most elements, and though the cockatoos are not as harsh, they have been the bane of farmers, eating grain sowed in soil or from crops. They make what is regarded as the worst calls in the bird kingdom. Thus the element is a good name for them. Despite this, they are a fairly intelligent and like budgerigars have made it into homes as a pet.