The Dingo is necessary...

Far from being vermin, Dingoes sustain biodiversity and help land managers control invasive species. They are key elements in the struggle to reduce damage caused by kangaroos, foxes and feral cats. Dingoes control kangaroo populations without the culling and supress foxes and feral cats. That's why ecosystems with dingoes have better vegetation and more diverse and abundant populations of small native mammals.