Over the past 200 years, a number of alien invertebrates, mammal and bird species were introduced to Macquarie Island. Some have had serious impacts on the island's native flora and fauna.
Horses, donkeys, pigs, cattle, goats, dogs and sheep are long gone, and between 1989 and 2000, weka and cats were eradicated. A major project to remove the last remaining mammal species - rabbits, ship rats and mice - has been under way since 2007, and aerial baiting of the entire island was completed in July 2011.
In the months following baiting, hunting teams and their dogs removed 13 rabbits. Hunting is expected to continue until 2015 to ensure that eradication has been successful.