Colias croceus on Centaurea pumilio

"Colias croceus" is a small butterfly of the Pieridae family, that is, the yellows and whites. In India and nearby regions it is known as the dark clouded yellow or common clouded yellow to distinguish it from the other species of clouded yellows occurring there; elsewhere it is often simply known as the clouded yellow, as it was the first and original butterfly to go by this name.