This a relatively long-lived butterfly. One of its host plants is willow. The caterpillars are gregarious and are found in abundance on the same branch.
This was reared from a caterpillar. It is newly eclosed. The other chrysalis will eclose within a day.
OLYMPUS IMAGING CORP. E-520, f/5.6 @ 190 mm, 1/320, ISO 800, No Flash
