A Giant Haast's eagle attacking moas in New Zealand. The Giant Haast's eagles were the biggest eagles that ever existed. Fossils of moas show the mark of their claws. I have seen some of these bones with claw marks at the National Musem in Wellington when I visited New Zealand. So scientists could prove that they really attacked moas and this drawing is not just a fantasy.
Some scientists even speculate that when the Maoris arrived in New Zealand, the Giant Haast's eagles attacked them too. Sadly, the Maoris hunted the moas to exstinction and without their main prey the eagles died out too.