species is often confused with Graphium
sarpedon luctatius (The Common Bluebottle) when in flight. There
are other similar looking species in Malaysia, but Graphium evemon eventus
is the only one of the group which occurs in Singapore. It can be distinguished
from the other species by its black costal bar on the underside of the
hindwing, which is united with the dark basal band.
The species flies very rapidly
and eratically, and is fond of flying up and down open sunlit jungle paths.
The bright blue upperside often shows itself as it flits quickly by an
observer. Graphium evemon eventus is a common butterfly in Singapore,
and can be seen on most sunny days in the nature reserves.
The caterpillar is believed to feed on a species of wild Cinnamon.