Among the larger butterflies, the swallowtail butterfly commonly encountered around Japanese homes has a forewing length of four to six centimeters. Its larva, known as a green caterpillar, eats the leaves of rutaceous plants like the trifoliate orange. The caterpillar sheds its skin four times, beginning with the first instar, and the larva becomes a chrysalis after the fifth instar. Ordinarily, it remains a chrysalis for approximately two weeks, but when hibernating over the winter, the larva can remain in the chrysalis stage for several months. The mature butterfly with its large, whitish yellow-spotted black wings can be seen roughly from March through October, searching for nectar from flowers and water.
Among the larger butterflies, the swallowtail butterfly commonly encountered around Japanese homes has a forewing length of four to six centimeters. Its larva, known as a green caterpillar, eats the leaves of rutaceous plants like the trifoliate orange. The caterpillar sheds its skin four times, beginning with the first instar, and the larva becomes a chrysalis after the fifth instar. Ordinarily, it remains a chrysalis for approximately two weeks, but when hibernating over the winter, the larva can remain in the chrysalis stage for several months. The mature butterfly with its large, whitish yellow-spotted black wings can be seen roughly from March through October, searching for nectar from flowers and water.