Spider Man said that butterflies have smaller bodies and are mostly seen in the daytime while moths have larger bodies and show up at night around light bulbs. Ireland's answer concerning the antennae is correct. Moths not only don't have clubs or knobs on the end, they are also often very feathery. Spider Man's answer was also correct. The body of butterflies are generally more slender than moths, and they are active during the day.
Most moths are active at night, but some are also active during the day.
Another way you can tell the difference is the way they hold their wings when they are resting. Butterflies usually hold their wings so that they touch each other high above their backs while moths usually fold them down against their body. Try the next one. Ireland said that air enters the insects body through breathing pores called spiracles. Then air tubes called tracheae and tracheoles carry air to all parts of the body.