Known as Harlequin Bugs, these True Bugs (Order: Hemiptera) are native to south-eastern Australia including Tasmania. They belong to the Pyrrhocoridae family which are sometimes known as Firebugs, Red Bugs, or Fruit Bugs. Indeed this particular species is considered to be a a minor pest of soft fruits. The two below were photographed in the Bells Parade Park at Latrobe where they were in tandem formation, busily ensuring the survival of the species. The aposematic coloration (warning sign colours) no doubt offers some protection as I for one was in no way tempted to eat them. You'll notice the smaller of the two has a damaged wing.
(Click on Photos to Enlarge)