What is Presbyornis?
{{Italic title}} {{Automatic taxobox |name = ''Presbyornis'' | image = Presbyornis pervetus AMNH 28505.jpg | image_caption = An assemblage of ''Presbyornis pervetus'' skeletons ([[AMNH]] 28505) | fossil_range = {{Fossil range|Late Paleocene|Early Eocene}} | taxon = Presbyornis | authority = [[Alexander Wetmore|Wetmore]], 1926 | subdivision_ranks = [[Species]] | subdivision = * ''P. pervetus'' <small>Wetmore, 1926 ([[Type species|type]])</small> * ''P. recurvirostra''<ref>{{Cite journal|first1=V.L.|last1=De Pietri|first2=R.P.|last2=Scofield|first3=N.|last3=Zelenkov|first4=W.E.|last4=Boles|first5=T.H.|last5=Worthy|year=2016 |title=The unexpected survival of an ancient lineage of anseriform birds into the Neogene of Australia: the youngest record of Presbyornithidae |journal=Royal Society Open Science |volume=3 |issue=2 |pages=150635 |doi=10.1098/rsos.150635 |pmc=4785986 |pmid=26998335|bibcode=2016RSOS....350635D}}</ref> <small>(Hardy, 1959)</small> * ''P. isoni'' <small>Olson, 1994</small> * ''P. mongoliensis''?<ref>{{cite journal |last1=Zelenkov |first1=N. V. |title=A revision of the Palaeocene–Eocene Mongolian Presbyornithidae (Aves: Anseriformes) |journal=Paleontological Journal |date=2021 |volume=55 |issue=3 |doi=10.31857/S0031031X21030132 |url=https://link.springer.com/article/10.1134/S0031030121030138 }}</ref> <small>Kurochkin & Dyke, 2010</small> | synonyms = * ''Nautilornis'' <small>[[Alexander Wetmore|Wetmore]], 1926</small> * ''Coltonia'' <small>Hardy, 1959</small> }} [[File:Presbyornis Enhancement.jpg|thumb|230px|Artist's impression]] '''''Presbyornis''''' is an extinct [[genus]] of water bird. It was a wading bird, often walking in shallow water on its long legs. ''Presbyornis'' was one of the first [[Anseriformes|anseriforms]]. Because of its long legs and neck, it was initially mistaken for a [[flamingo]]. Later it was reclassified as an anseriform when the [[duck]]-like anatomy of its [[skull]] and [[beak|bill]] was found. It is from an extinct group closely related to [[Anatidae|ducks and geese]