adults are normally found in small "leks" of up to a dozen
The males fly very slowly
and almost incessantly around the lek area, only pausing to settle for
a moment here and there, at which time they slowly fan their wings,
probably to aid dissemination of pheromones from the androconial
"hairs" on their wings.
of most Oleria species visit
Eupatorium, from which they acquire
pyrrolizidine alkaloids which they pass to the females during
copulation, and which is believed to be essential for the production
of viable eggs.
visit various flowers for nectar and pollen - the latter may be
essential in the production of eggs and the maintenance of ovaries, as
has been demonstrated to be the case with Heliconiines. Females also
receive proteins during sperm transfer.
Gravid females fly very slowly,
periodically dipping down to investigate Solanum
plants. Having found the foodplant they then spend 2 or 3 minutes
testing it, using olfactory sensors on their legs, antennae and
abdomens, to determine whether it is Solanum
mite or another related species.
common with most other Ithomiines, lateral and altitudinal migrations
of Oleria species are triggered by
seasonal changes in humidity.