Seven hundred-odd kilometres south of Papakura, as the crow flies, the Department of Conservation is waging war on introduced pests. Great stuff, many people might think, giving the matter a quick nod of approval before carrying on with their busy lives. This is what DOC does, after all. It conserves. That’s what conservation means, doesn’t it? They work tirelessly to preserve and protect, to resurrect and regenerate, to keep everything that’s…