The government has announced its intention to make New Zealand predator-free by 2050. Prime Minister John Key said rats, possums and stoats kill 25 million native birds a year. He said the introduced pests also threatened the country’s economy and primary sector with a total cost of $3.3 billion a year. More than 7000 hectares of the New Zealand mainland as well as more than 150 offshore islands were now completely free of predators, Mr Key said. In addition a further 1 million hectares of conservation land were under sustained predator control. The government will invest $28 million in a new joint venture company called Predator Free New Zealand Ltd.