The female common birdwing lays single eggs, which she attaches to the surface of the Indian birthwort leaves. After hatching about four to five days later, the emerging caterpillar consumes the eggshell and then begins to eat the surrounding leaves, feeding both day and night (2).
After around three to four weeks the caterpillar begins its transformation into a pupa, which takes two days. The pupa remains in this state for the next two weeks as the metamorphosis into a butterfly progresses. After a total of 40 or more days from the moment the egg is laid, the adult common birdwing emerges from the pupa, allowing its wings to dry before attempting its first flight. The adult lives for around four to six weeks, feeding and mating before it dies (2).