
Several thousand species of butterflies are known worldwide. The
nymphalids, brush-footed butterflies, are by far the largest family, but most of the other families include some familiar species seen everywhere. Many members of all families are brightly colored, but the morphos and some of the hairstreaks, especially in the tropics, are most brilliant with iridescent blues and greens caused by submicroscopic structures on the scales. Many of the larvae and pupae (chrysalids) are brightly colored or grotesquely shaped and bear spines, horns, or peculiar filaments.


