The toads, Bufo Marinus, were introduced from South America into northeast Queensland state in the 1930s to control another pest -- beetles that were ravaging the sugar cane fields of the tropical northern coasts.
But the toads now number in the millions and are spreading westward through the Northern Territory, upsetting the country's ecosystem in their wake.
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Unintended consequences or what?
Don't mess with mother nature. Kudzu comes to mind. At least it's not poisonous.
Import cane toads to Australia to eat beetles. Import Kudzu into the American South to stop erosion. Import English Ivy because it's pretty. Import nutria to Louisiana for a cheap supply of fur.
Say it with me, kids: No natural enemies. Let that be a warning.