Together with the royal owl (Caligo uranus), the largest butterflies of El Salvador.  The white morpho is a mid-altitude flier, unlike the blue morpho which flies close to the ground.  Especially in the case of the females, one is amazed to see so small a body moving so large wings.  Unlike the blue morpho (Norpho helenor or peleides), both males and females fly along routes that seem to be marked with invisible (to humans) traffic signals: “Turn right and up here; to the left and straight here . . .etc.”  Also, in nature, they fly only during two, at times three period of the year: late Marcg to early May; late August and September and, not too fequently, in December.  The blue morpho fliers all year long, from sea level to over 2000 m.a.s.l. in the cloud forest.  The hairs on the body of the last stages caterpillars are highly irritating, but if handled with care, can be oved from one plant to another with no ill effects.