Moa bones (such as this tibiotarsus) still occasionally erode out from river banks where the gigantic bird may have died or been hunted and butchered. During the last century, farmers in Otago and Canterbury regularly ploughed up moa remains, sometimes in such great quantities they could grind them up for fertiliser. Today such finds are rare. The speed at which the evidence of New Zealand’s extinction is vanishing may explain why there is so little evidence for megafauna hunting in other parts of the world, where the events were far more ancient.