Paradise Birdwing

The birdwing swallowtails from tropical Asia are some of the largest, most spectacular, and most endangered butterflies in the world. All show high levels of sexual dimorphism (i.e., males and females are different in size and color). Female birdwings are larger and much duller in color than the males (shown here), which come in glowingly iridescent colors of brilliant sapphire, emerald, and topaz.