Butterflies are ectotherms. They rely on heat from external sources. Moths prefer to rest during the day, usually in a wooded, dark habitat.
Butterflies pull nectar from flowers. Some species drink tree sap and fruit juices. Moths enjoy natural fibers in curtains, bed sheets, upholstery, and clothes, and have an appreciation for wool, silk, cotton, cashmere, and lint.
Butterflies have two wings on each side of their bodies. The infrastructure is such that the wings move independently. While Moth wings are scaled. Air trapped in the scales lifts them.
For the butterfly caterpillar, the main job is to eat and eat and eat to ensure the healthy growth of the caterpillar. While Moth larvae infest primary sources of food. They prefer undisturbed, dark areas where food is easily accessible.