The order Anseriformes (waterfowl) contains three families:

• Anhimidae
• Anseranatidae
• Anatidae

Timetree of Anseriformes with the interfamilial relationhips being based on Prum et al. (2015). The distribution of each family is indicated by the colour-code used throughout this website (see Distribution colour code). Divergence times are taken from Prum et al. (2015), Claramunt & Cracraft (2015), and Andersen et al. (2018).

References

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Worthy, T.H., and S.L. Olson (2002), Relationships, adaptations, and habits of the extinct duck 'Euryanas' finschi, Notornis 49, 1-17. (pdf)