A moth is an insect, and there are thought to be 160,000 species of moths worldwide. This insect is in the butterfly category. However, studies show that moths were in existence millions of years before butterflies existed. In fact, it’s estimated that moths may have evolved as far back as 190 million years ago. This makes this one of the longest living insects in the world. A moth tattoo is symbolic of many things, and some of these include determination, vulnerability, prosperity, attraction, transformation, intuition and even faith to some people. If you like the moth, you may consider this nocturnal insect.