A white form of the monarch has been seen in Australia, New Zealand, Indonesia and the United States. It has been seen as early as 1896. It was named "nivosus" by lepidopterists (a lepidopterist is a person who studies butterflies and moths). It is grayish white in all areas of the wings that are normally orange. The white form makes up about 1% or less of all monarchs except for on Oahu, Hawaii where it has kept populations as high as 10%. The existence of two or more forms of a species in the same area is quite common, and is called polymorphism.