![Imfographic showing how Pieris rapae butterfly arrived in NZ](http://static.sciencelearn.org.nz/images/images/000/004/019/full/OSC_ART_20_The_Pieris_Project_NZ-origins.png?1674172836)
One surprising finding of The Pieris Project so far was the source of introduction to New Zealand. It seemed logical that Pieris rapae hitched a ride on one of the many trade ships that visited from the UK in the 1930s, when the population was established here. As it turns out, Pieris rapae hitched a ride on a ship from San Francisco! After arriving in New Zealand, a small population then quickly made its way over to Australia.