It's the natural companion to Caterpillars and How They Live (1965, p. 682- J230) and equally informative. The viewpoint is structural with emphasis on how the bodies of the moths and butterflies allow them to fulfill their functions--flight, gathering nectar and pollen, mating, protection. The author also explains how to differentiate between butterflies and moths and describes the characteristics of their major families. A final chapter on collecting and observing ties the book together as an aid to class or individual projects.