This butterfly is easily identified by the intense yellow colouring, much brighter than that of sulphur, lemon, corncob or sunflower. The yellow butterfly or also known by its scientific name Colias croceus is a day butterfly that belongs to the family of Pieridae. This insect is one of the most colourful, because it belongs to the group of the most striking butterflies in the world. The yellow butterfly represents joy, creativity, fun, happiness, success, prosperity, rebirth, expectation, festivity, love, passion, adventure. A great positive change. A fleeting encounter. If you see a yellow butterfly it means that something fun and exciting is on its way.