Monarch Life Span When it comes to monarch butterflies, determining their life span is very difficult. They go through so much in their life, but we can split their life span into four different parts. For instance, the first stage is going to be the egg stage, the next stage is the caterpillar (also known as the larva stage), the third stage is the pupa (also known as a chrysalis) and finally, the butterfly will become an adult in the final stage of their life cycle. When a female monarch butterfly lays an egg, it usually only takes a caterpillar about three to five days to develop and then eat through the eggs surface and break out onto the leaf. This is the very start of the monarch butterfly’s life span. While the caterpillar is only about 0.1 inches long (tiny!) and will only weigh about 0.55grams, it is a tough little guy and definitely one of the strongest insects of its kind. Usually, the body of the caterpillar will be covered with nine brown rings aside from black head and it...