Butterflies differ from humans in a number of easily identifiable ways.
As the insect grows from an egg to a lava or caterpillar and into a butterfly, it must change its exoskeleton through a process known as molting. The life cycle of the monarch is made up of a number of these molts - egg, caterpillar, chrysalis and finally butterfly. This whole transformation process takes roughly a month but can vary by several weeks depending upon temperature. Monarchs are more dependant on temperature than humans because their body temperature is directly affected by air temperature and sunshine hours. The monarch egg is only about the size of a pin head, but is a master piece of engineering when observed under a microscope.