A British duke sent six Himalayan tahr to New Zealand in 1904; five survived the voyage, and their descendants later grew into tens of thousands that now damage fragile alpine ecosystems

• The Himalayan tahr is a large, shaggy mountain ungulate native to the Himalayas that has become an invasive species in New Zealand.
• 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.