When Captain James Cook sailed through New Zealand's Marlborough Sounds during his second and third voyages in the 1770s, he deliberately released pigs and goats into the bush, hoping to establish a self-sustaining source of meat for future European sailors who might pass through the region. Cook could not have known that these animals would go on to multiply far beyond anyone's expectations, spreading across both main islands and eventually causing serious damage to the native forests and wildlife that New Zealand's ecosystems had evolved without any land mammals present at all. Their descendants are still found across the country today, and wild pigs in the South Island are still commonly known as Captain Cookers, a name that directly credits the explorer with their unintended legacy. It's a striking case of intentions and outcomes pulling completely apart over time. Cook meant to leave sailors a safety net, and instead left New Zealand a conservation problem that's outlasted his own voyages by more than two centuries.
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