[vince_refiti]

Their neighbours the Australians brought in the cane toad (Rhinella marina) to control the cane beetle.

[phillc73]

Rabbits, foxes, water buffalo, camels..... the list is quite long, take your pick:

http://www.environment.gov.au/biodiversity/invasive-species/...

[vacri]

I've never been able to find the footage again, but it was quite something - arid scrubland in the foreground, rabbit-proof fence across the middle, and orange sand from there to the horizon. On the other side of the fence was a boiling mass of furry bodies; rabbits trying to get into the scrub.