Luna moths (Actias luna) reside in hardwood forests, their caterpillars especially love butternut, yellow birch, and beech trees. They are members of the giant silk moth family (Saturniidae) but unravelling a cocoon for silken thread would doom the chrysalid. The true, domesticated, mulberry-leaf-eating silkworms of China belong to a different family of moths. Luna moths lack mouths and digestive tracts, and live for only a week on wingspans of 10cm. They fly only at night. The moons on their wings are believed to resemble eyes and used to intimidate predators. It is like a treasure to know "chrysalid" derives from the Greek word for "gold."