Female Queen Alexandra’s Birdwings (left) are the largest butterflies in the world, reaching wingspans of more than 14 inches. Males (right) are smaller, but more beautifully colored than females: they have iridescent green and blue markings and a bright yellow abdomen, while females have brown wings with white markings and a cream-colored abdomen. Birdwings are members of the swallowtail family (Papilionidae).