A male Common Archduke, of the species with orange tips to its antennae. It has mainly black wings with small, faint blue and orange spots at the top, whilst the posterior wings have a grayish light-blue outer border with black spots.

There are two species found in Thailand, with identical patterns and colours on their wings, though they are differentiated by the fact that one has orange tips to its antennae, as seen in the individual above.

The latter was spotted in Oub Luang National Park in Chiang Mai, in northern Thailand, whilst the other has black tips, seen in the other photo and spotted in Nahm Tok Ron Nature Park in Krabi (fig.), in southern Thailand.