We've known about Genyornis newtoni for quite some time. The species, which died out around 45,000 years ago, was first described in 1913. An imposing bird standing up to 2.25 meters (7.4 feet) tall and weighing up to 230 kilograms (510 pounds), Genyornis newtoni would have been a formidable presence in the grassland habitats it preferred across a vast swathe of the Australian continent. But a new discovery suggests that we may have misinterpreted the bird.