EDIT 28-9-20 The original cache has disappeared as the branch it was on has fallen. New cache is a black bison tube
This is a quick park and grab. The cache is pretending to be something it’s not, much like cuckoo chicks which are raised by parents of different species after the adult cuckoo lays her eggs in another’s nest. I have seen Fan-tailed Cuckoos and Horsfields Bronze-Cuckoo in the Onkaparinga River National Park.