original: Its distinctive speckled colouration has given it a common name of Magpie Moth.
simplifications: it's unique spotted coloring has given it the name Magpie Moth. Its dotted color has given it a name of Magpie Moth. It's coloration give it's name, Magpie Moth. The unique flecked color is why it's called a Magpie Moth. Due to its speckled colouration, it is often called Magpie Moth. Its  speckled coloration has given it the common name of Magpie Moth. Because of its distinctive speckles, it is called the Magpie Moth. Its distinctive coloring gave it a common name of Magpie Moth. The special speckled color helped give it the name Magpie Moth. Its unique speckled coloring has given it the common name of Magpie Moth.