在人类抵达之前的八千万年间，纽西兰是一片没有陆生哺乳动物的独特土地，这使得当地的鸟类在没有地面掠食者的环境下演化，许多物种因此失去了飞行能力并填补了生态空缺，例如南秧鸡（takahē）和奇异鸟（kiwi）。然而，人类的定居与外来哺乳类掠食者（如老鼠、白鼬、负鼠和野猫）的引入彻底改变了当地的生态，导致在七百年间约有百分之四十的特有鸟类灭绝。（关键数字：80, 40, 700）
面对严峻的灭绝危机，纽西兰在过去半个世纪展开了非凡的保育行动，采取「保育引入」策略，积极控制外来掠食者并将濒危鸟类转移到安全的离岛或受保护的围栏保护区内。演化生物学教授卡尔·伯格斯特龙（Carl Bergstrom）回忆自己十岁时首次造访纽西兰，当时南秧鸡几乎无法在野外见到，但如今在斯图尔特岛（Rakiura）与威灵顿市中心的保护区里，他不仅在夜间偶遇了野生奇异鸟，更亲眼目睹了南秧鸡家族，见证了物种复育的显著成果。（关键数字：10）
尽管部分海鸟与本土企鹅仍受气候变迁与过度捕捞的威胁，但奇异鸟的复育计划展现了令人振奋的希望。由于奇异鸟采取长寿但低繁殖率的「慢速生活史策略」，牠们在年幼时极易受到白鼬攻击，直到体重达到约一点二公斤的「防白鼬体重」后才能凭借强壮的双腿自卫。在威灵顿山区的「首都奇异鸟计划」中，富含无脊椎动物的放牧草地与荆豆灌木丛形成了绝佳栖息地，让四个月大的幼鸟迅速达标并被成功野放，有望在山林中安享长达五十年的寿命。（关键数字：1.2, 50）
For 80 million years prior to human arrival, New Zealand was a unique landmass devoid of terrestrial mammals, allowing its native birds to evolve without ground predators, lose the ability to fly, and fill ecological niches—such as the takahē and the kiwi. However, human settlement and the introduction of mammalian predators like rats, stoats, possums, and feral cats drastically transformed the ecology, driving roughly 40% of endemic bird species to extinction within 700 years.
Confronting this severe extinction crisis, New Zealand has mounted an extraordinary conservation effort over the past half-century, utilizing a "conservation introduction" strategy that controls invasive predators and relocates endangered birds to safe offshore islands or fenced mainland sanctuaries. Evolutionary biology professor Carl Bergstrom recalls his first visit to New Zealand at age 10 when seeing a wild takahē was virtually impossible, whereas on his recent trip to Rakiura and a sanctuary in the heart of Wellington, he not only encountered a wild kiwi at night but also came face-to-face with a family of takahē, witnessing the remarkable success of species recovery.
Although certain pelagic birds and native penguins remain gravely threatened by climate change and overfishing, kiwi restoration initiatives offer inspiring hope. Because kiwi evolved a "slow life-history strategy" characterized by a long lifespan and low reproductive rate, chicks are highly vulnerable to stoats until they reach a "stoat-proof weight" of about 1.2 kilograms, at which point they can defend themselves with their powerful legs. Through the Capital Kiwi Project in the hills around Wellington, grazing pastures rich in invertebrates combined with gorse cover create a super-habitat that enabled a four-month-old chick to rapidly reach this milestone weight and be released into the wild, where it can thrive for the next 50 years.