Swallowtails

This morning I visited our citrus trees to find a lemon for a lemon & honey drink ( Got a bit of a cold ) and I found some of the exotic caterpillars that Bert and Ben have been observing around  Boho and Strathbogie. Feasting on our orange trees was an assortment of caterpillars and when I looked around the large butterflies were feeding high up on our red flowering gums . They must be migrating south , has anyone in Highlands or Seymour seen unusual caterpillars ?