The cane toads have poison glands on them and there is only one type of predator that is immune to it. Unfortunately it is a small snake and it can only eat one toad a month.
We have got some wild dogs - the native dingo and domestic dogs gone feral. For the most part there are not large numbers of either.
Not that you are allowed to hunt them but Great White sharks are prevalent around the coast line. Luckily you don't have to worry about them in Darwin because the crocs eat them
