Altogether, each butterfly eye can contain up to 17,000 of these receptors, though many species have fewer. Photoreceptors distinguish color and brightness. In a human eye, many light-sensitive ...

See some of these painted ladies up-close. Orchard Swallowtail Butterfly (Papilio aegeus) found in eastern Australia, from Queensland to Victoria. The Cairns Birdwing Butterfly (Ornithoptera priamus) ...