The island on New Zealand’s $5 note once held 200,000 rats; a 19-person team cleared them all, and native birds returned

Campbell Island, previously invaded by Norway rats, saw a remarkable transformation thanks to a comprehensive eradication initiative. A skilled team carried out aerial baiting to eliminate the invasive rodents, facilitating the resurgence of indigenous species like the Campbell Island snipe. With predators gone, birds began reclaiming once-lost habitats, illustrating the profound effect of eradicating non-native mammals on the island’s ecosystem.
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