Choose one male and one female. Identify the male and female butterflies and then separate the couples and put them in a clear cage where they can mate. Like with other creatures, such as ducks, male butterflies have brighter colors than female butterflies to attract the females to them. You can also tell them apart because male wings are shorter, and female bodies are shorter and fatter – which lets them carry eggs more effectively.
Put the male and female butterflies together. Place the butterflies in a large glass tank that allows air control. Leave the butterflies some food and plants, and put it in an area that allows sunlight. Be careful to control the sunlight as butterflies generate energy form sunlight, and you don't want them to be too energetic. Once they're together, they will naturally breed.
Watch the butterflies mate. The male will attach to the female abdomen to abdomen and will face one another, as their reproductive organs are in the abdomen. Butterflies' main priority is to mate as frequently as possible, because they only live for two weeks as adults. The female can lay up to 500 eggs at a time, and may lay one or several at a time.
Remove the male. Put the male in another container. After the female has laid all of her eggs–about a day after they mated originally, you can put the female back with the male or put her in another container. If you put her back with the male, they will mate again.
Watch the eggs hatch. After about five days, the eggs will hatch and there will be a caterpillar, which will immediately begin eating the leaves that are in the container. After about two weeks, they will turn into a butterfly and the whole process can start over again.
