When a species goes extinct, you take out one piece of the food web, affecting everything above and below it. When the Moa went extinct, so too did it’s main predator, the largest eagle to ever have existed, Haast’s eagle, Hieraaetus. Once it flew through the forests of New Zealand, preying on the Moa, grabbing their pelvis and slashing their neck with their sharp talons, which gave them their initial (and cooler sounding) scientific name of Harpagornis.
