Larval food plants are in the citrus family and do not exist in the park. I have previously seen the species mating at the Gellibrand Hill summit, and I assume this one next to Providence Road was there for the same purpose. I may have seen one in exactly the same spot last year. Presumably it is the closest place to someones Lemon tree that matches the criteria for a mating site.
This Chrysalis was seen about 12 days after the small early instar of this butterfly was seen. It was hard to differentiate between the pupa and plant stem as it looked very much in colour & form like a stem gall induced by a citrus gall wasp. One end of the 3 cm pupa was bifurcated.