What animal was brought to Australia to control pests?

The introduction of cane toads (Bufo marinus) to Australia in the 1930s is one of the foremost examples of an exotic animal release gone wrong. Originally imported from Hawaii and released in Queensland as a biological control for beetle pests of sugar cane, the cane toad is now a well-established pest itself.

1. What was the most useful animal introduced into Australia?
2. Why did they bring cane toads to Australia?
3. Why was the Blackberry introduced to Australia?

What was the most useful animal introduced into Australia?

Introduced to Australia in 1788 aboard the First Fleet from Europe, horses were transported across for farm and utility work by the settlers. The long sea journey to Australia saw the loss of many horses, meaning those that made it to Australia were healthy and strong, which consequently helped them to flourish.

Why did they bring cane toads to Australia?

Cane toads became pests after being introduced into Australia to control destructive beetles in Queensland's sugarcane crops. Cane toads are capable of poisoning predators that try to eat them and they continue to spread across Australia.

Why was the Blackberry introduced to Australia?

In the 185os, von Mueller deliberately spread blackberry seeds into the Victorian bush so that hikers could enjoy a snack on their travels. They can tolerate a wide range of environmental conditions but are less successful in drier climates.