The order Anseriformes (waterfowl) contains three families:

• Anatidae (Ducks, Geese, Swans)
• Anseranatidae (Magpie-Goose)
• Anhimidae (Screamers)

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 code). Divergence times follow Kuhl et al. (2021). 

References

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and Tachyeres: four morphologically divergent duck genera endemic to South Ameria, J. Avian Biol. 41, 186-199. (abstract)

Bulgarella, M., C. Kopuchian, A.S. di Giacomo, R. Matus, O.Blank, R.E. Wilson, and K.G. McCracken (2014), Molecular phylogeny of the South

American sheldgeese with implications for conservation of Falkland Islands (Malvinas) and continental populations of the Ruddy-headed Goose Chloephaga rubidiceps and Upland Goose C. picta , Bird Conserv. Internat. 224, 59-71. (pdf)

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Kuhl, H., C. Frankl-Vilches, A. Bakker, G. Mayr, G. Nikolaus, S.T. Boerno, S. Klages, B. Timmermann, and M. Gahr (2021), An unbiased molecular approach

using 3'UTRs resolves the avian family-level tree of life, Mol. Biol. Evol. 38 (1), 108-127. DOI: 10.1093/molbev/msaa191. (pdf)

Liu, G., L. Zhou, B. Li and L. Zhang (2014), The complete mitochondrial genome of Aix galericulata and Tadorna ferruginea: bearings on their phylogenetic

position in Anseriformes, PLoS ONE 9(11): e109701. doi:10.1371/journal.pone.0109701. (pdf)

McCracken, K.G., J. Harschman, D.A. McClellan, and A.D. Afton (1999), Data set incongruence ,and correlated character Evolution: An example of

functional convergence in the hind-limbs of stifftail diving ducks, Syst. Biol. 48, 638-714. (pdf)

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Prins (2016), A tree of geese: a phylogenomic perspective on the evolutionary history of geese, Mol. Phylogenet. Evol. 102, 74-85. (abstract)

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attributable to variation at the MC1R locus?, BMC. Evol. Biol. 8, 249. (pdf)

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Prum, R.O., J.S. Berv, A. Dornburg, D.J. Field, J.P. Townsend, E.M. Lemmon and A.R. Lemmon (2015), A comprehensive phylogeny of birds (Aves) using

targeted next-generation DNA sequencing, Nature 526, 569-57. (abstract)

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Hawaiian waterfowl, based on ancient DNA, Proc. Royal Soc. B 266, 2187-2193. (pdf)

St. John, J., J.P. Cotter, and T.W. Quinn (2005), A recent chicken repeat 1 retrotransposition confirms the Coscoroba-Cape Barren Goose clade, Mol.

Phylogenet. Evol. 37, 83-90. (abstract)

Sun, Z., T. Pan, C. Hu, L. Sun, H. Ding, H. Wang, C. Zhang, H. Jin, Q. Chang, X. Kan and B. Zhang (2017), Rapid and recent diversification patterns in

Anseriformes birds: Inferred from molecular phylogeny and diversification patterns, PLOS ONE | https://doi.org/10.1371/journal.pone.0184529 September 11, 2017. (pdf)

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