The denouncement of Mister Possum is in the words and music of a rock song, which is not exactly a la Acca Dacca (the band) or not Dame Edna's (the female impersonator-entertainer) possum but is about the cute (Australian) animal that is a real pest in Te Aroha (New Zealand) since its introduction in 1837, for without any natural predators it wrecks havock with their environment.
The strategy is to fly them back to Oz!

Here, rabbit, fox, cat, carp, myna birds and cane toad are our serious introduced pests.

Oh, No Mister Possum by Erin Devlin illustrated by Greg O'Donnell. Penguin Group, New Zealand. 2008. Words, music and CD.