Spend enough time at a New Zealand lake and you will probably see a grey duck without knowing it. The problem is not that the pārera is rare exactly — it is that it looks almost exactly like a female mallard, which is common, and the hybrid of the two, which is now everywhere. Distinguishing them requires attention to face stripes, bill colour, and speculum pattern, which is more effort than most people put into a bird they have already decided is just a duck. Before mallards arrived, the grey duck was the dominant dabbling duck throughout New Zealand. It bred in rivers, lakes, coastal wetlands, and forest streams, and was hunted by Māori and later by European settlers in large numbers. Then came the mallard, introduced repeatedly from the 1860s onward, and the situation became complicated. Mallards and grey ducks interbreed readily, producing fertile hybrids. Those hybrids breed with other hybrids, and with mallards, and occasionally with grey ducks. The gene pool does not stay tidy under those conditions. The result is a population that looks, on the surface, as though it might still contain grey ducks, but probably does not contain many pure ones. Genetic testing is the only reliable method of establishing which birds are which, and it has not been applied at the scale needed to give a clear national picture. What is clear is that phenotypically pure grey ducks, birds that look like grey ducks by the traditional morphological markers, are now uncommon at most sites where they were once abundant. The trend has been consistently one-way. There is an additional complication that makes this an unusual conservation problem. The grey duck remains a legal game bird in New Zealand, meaning it can still be shot during the duck hunting season despite its nationally vulnerable classification. Hunters are asked to distinguish it from mallards before shooting, which is genuinely difficult in the field and arguably unreasonable as a management strategy. This creates a situation in which a threatened native bird sits on the same quarry list as the introduced species that is replacing it. The pārera itself, seen cleanly and in good light, is a handsome animal. Dark brown overall, each feather edged paler, with strong facial stripes and a green-and-black speculum visible in flight. It feeds broadly and adapts to modified landscapes as readily as the mallard does. It is not a species that failed on its own ecological terms. It simply met a competitor that arrived with the full momentum of globalised agriculture behind it, and the outcome was predictable from early on. Conservation efforts exist but remain underfunded and technically difficult. The hybridisation problem is not one that trapping or predator control can solve.