Our moth is known from the Northern Territory and north Queensland south to central New South Wales. The caterpillars feed on a wide range of rainforest trees but eucalyptus is not one of them.
What could be the reason for the outbreak of these two moths at approximately the same time of year at localities so different and so far apart. Maybe it is associated with the phase of the moon (see the moon to the left!) or the fact that these moths emerge every spring at this time. Or, perhaps, the excessive wet period of last year was just what these species needed to provide abundant food plants that has led to the large numbers of adults on the move.
Below is a sample of males of S. janetta illustrating some of the variation distinctive of this species. Additional examples can be viewed on Buck Richardson's Kuranda Moth site.The most common colour morph of S. janetta.
The least common colour morph of S. janetta.