New Zealand's Himalayan tahr grew from five survivors to tens of thousands
The Himalayan tahr, introduced to New Zealand in the early 20th century for sport hunting, has proliferated into an invasive species. Without natural predators, the population has grown from five survivors to tens of thousands, causing significant damage to alpine ecosystems.
Why it matters
This case highlights the long-term ecological consequences of human-led species introduction and the ongoing challenges of managing invasive wildlife in protected alpine environments.
In 1904, a gift from a British aristocrat brought a handful of shaggy mountain goats to the remote peaks of New Zealand’s South Island. The aim was to build up big game stocks for visiting sport hunters. But those few animals started an environmental problem that still worries conservationists and land managers today. The animal at the centre of the issue is the Himalayan tahr (Hemitragus jemlahicus), a strong mountain animal native to the highlands of Asia. In its native range, the species is listed as near threatened by the International Union for Conservation of Nature (IUCN).
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