Science, Tech, Math › Animals & Nature Haast's Eagle (Harpagornis) Share Flipboard Email Print John Megahan/Wikimedia Commons/CC BY 2.5 Animals & Nature Dinosaurs Dinosaurs & Birds Basics Paleontologists Carnivores Herbivores Marine Reptiles Prehistoric Mammals Amphibians Birds Habitat Profiles Mammals Reptiles Wildlife Conservation Insects Marine Life Forestry Evolution View More By Bob Strauss Science Writer B.S., Cornell University Bob Strauss is a science writer and the author of several books, including "The Big Book of What, How and Why" and "A Field Guide to the Dinosaurs of North America." our editorial process Bob Strauss Updated August 13, 2018 Name: Haast's Eagle; also known as Harpagornis (Greek for "grapnel bird"); pronounced HARP-ah-GORE-niss Habitat: Skies of New Zealand Historical Epoch: Pleistocene-Modern (2 million-500 years ago) Size and Weight: About six foot wingspan and 30 pounds Diet: Meat Distinguishing Characteristics: Large size; grasping talons About Haast's Eagle (Harpagornis) Wherever there were large, flightless prehistoric birds, you can be sure there were also predatory raptors like eagles or vultures on the lookout for an easy lunch. That's the role Haast's Eagle (also known as Harpagornis or the Giant Eagle) played in Pleistocene New Zealand, where it swooped down and carried off giant moas like Dinornis and Emeus — not full-grown adults, but juveniles and newly hatched chicks. As befitting the size of its prey, Haast's Eagle was the biggest eagle that ever lived, but not by all that much — adults only weighed about 30 pounds, compared to 20 or 25 pounds for the largest eagles alive today. We can't know for sure, but extrapolating from the behavior of modern eagles, Harpagornis may have had a distinctive hunting style — swooping down on its prey at speeds of up to 50 miles per hour, seizing the unfortunate animal by the pelvis with one of its talons, and delivering a killing blow to the head with the other talon before (or even while) taking flight. Unfortunately, because it relied so heavily on Giant Moas for its sustenance, Haast's Eagle was doomed when these slow, gentle, flightless birds were hunted to extinction by the first human settlers of New Zealand, going extinct itself shortly afterward.