| Genyornis Temporal range: Late Pleistocene
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Superorder: | Galloanserae |
| Family: | †Dromornithidae |
| Genus: | †Genyornis Stirling & Zietz, 1896 |
| Species: | †G. newtoni
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| Binomial name | |
| †Genyornis newtoni Stirling & Zietz, 1896[1]
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Genyornis newtoni, also known as the Newton's mihirung, Newton's thunder bird or mihirung paringmal (meaning "giant bird" in Tjapwuring), is an extinct species of large, flightless bird that lived in Australia during the Pleistocene Epoch until around 50,000 years ago. Over two metres in height, they were likely herbivorous.[2] Many other species of Australian megafauna became extinct in Australia around that time, coinciding with the arrival of humans. It is the last known member of the extinct flightless bird family Dromornithidae which had been part of the fauna of the Australian continent for over 30 million years. They are not closely related to ratites such as emus, and their closest living relatives are thought to be fowl.