2011 Rat Eradication on Henderson Island Leaves Survivors

In 2011, conservationists spread 75 tonnes of poisoned bait across Henderson Island, a remote South Pacific island, to eradicate its invasive rat population. The campaign killed most rats, leaving only 60‑80 survivors, but the rat numbers rebounded to previous levels within two years. This outcome highlights the challenges of complete eradication and the resilience of invasive species.