Invaders!

A little backround:

These creatures are not native to the Australia country at all, they naturally derive from North, Central, and South America.

Why they are here:

The toad was origionally introduced to Australia in the 1930's in order to kill off and control different types of pests that were going after sugar cane plants, that included rats and cane beetles.

Problems:
Cane toads are so problematic because of the bufogenin poison it excretes. This poison cannot be tolerated by other animals that have not adapted to eat these toads. All possible predators are killed off by these toads and do not have a chance to attack. These poisons are killing off species all over the continent and now moving into the sea waters where many more are in danger.

Solutions:

One way of helping to solve the problem was to help train different marsupials and mammals, like the quolls, in a taste test. To help these animals not be attracted to Cane toads they set up nauseasting tastes and smells to be associated with the toad. Thus making the animals not attracted just based on instinct.

In America:

The Cuban Tree Frog was introduced by travel and trade of different plants between Cental America and North America. These frogs are seen to be cempeting with native Floridian frogs for survival and are winning. In lab tests it was shown that given the choice between insects (more commonly preffered) and native species of other frogs, they attacked the natives.

Solutions:

There is not a huge danger in them multipling and moving upwards because of the climate so they are contained more towards swampy florida, but they are trying to keep their predators, snakes and owls, protected and healthy in order to keep the alien species down.