Pest control
Tammar wallabies from these areas were introduced to Kawau Island in New Zealand by colonial administrator Sir George Grey in 1870. They were introduced to the Rotorua area in the early 20th century. Since then, they have flourished to the point where their foraging has damaged indigenous plants. Pest control operators have used sodium fluoroacetate, a naturally occurring rodenticide, to control their populations, a practice which has been controversial because of its possible effect on organisms not targeted by the poison, including humans. Cyanide pellets have been used as an alternative.