In 2016, New Zealand targeted an estimated 200,000 mice on Antipodes Island; two years later they were declared gone, and subsequent surveys found two native bird populations had more than doubled

• The team used helicopters to spread cereal bait containing the rodent toxin brodifacoum (Picture: Mouse free marion)In 2016, New Zealand launched a major operation to remove an estimated 200,000 mice from the remote Antipodes Island.
• The mice were the only mammalian pest species on the island, but their impact on the ecosystem was significant.
• According to the country's department of conservation, the mice were eating large numbers of invertebrates and plant seeds.