Ask a bird lover if they have heard of the extinct giant moa or its ancient predator, Haast’s eagle, and the answer will likely be yes. The same can’t be said of New Zealand’s extinct, but equally unique, mergansers – a group of fish-eating ducks with a serrated bill.
The only southern hemisphere representatives of this group are the critically endangered Brazilian merganser and those from the New Zealand region, which are now extinct.
