Wildlife Spotting

Neither do I Shanna :-) Well beyond my comfort zone, hence I won't make a formal suggestion! There are probably others too. At least this one has been widely reported in Australia.

Hi Shanna! You may want to have a look at this one. It is reported in Australia and is a world-wide pest. http://en.wikipedia.org/wiki/Nezara_viridula

Yes, you could, but believe me it is very likely that it could have survived on tourist's bag because many time I have seen them survive without water or in really cold weather while I believed they should be dead! Good luck with determination and try to avoid to get sprayed with its smell cause it is terrible! ;)

looks totally like European stink bug Acrosternum hilare ...