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Article

Aberrant plumage in the Yellow-billed Pintail Anas georgica

Robert E. Wilson, Auteur ; Thomas H. Valqui, Auteur ; Kevin G. McCracken, Auteur

Dans Wildfowl (56 2006)

Plumage aberrations are common, particularly in waterfowl. There have been numerous proposed causes including the retention of ancestral plumage characters that contain phylogenetic information. A partial white neck ring was observed in Yellow-b[...]

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Article

Divergence and gene flow in the globally distributed blue-winged ducks

Joel T. Nelson, Auteur ; Robert E. Wilson, Auteur ; Kevin G. McCracken, Auteur ; Graeme S. Cumming, Auteur ; Leo Joseph, Auteur ; Patrick-Jean Guay, Auteur ; Jeffrey L. Peters, Auteur

Dans Journal of Avian Biology (48(5) MAY 2017)

The ability to disperse over long distances can result in a high propensity for colonizing new geographic regions, including uninhabited continents, and lead to lineage diversification via allopatric speciation. However, high vagility can also r[...]

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Article

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

Mariana Bulgarella, Auteur ; Cecilia Kopuchian, Auteur ; Adrian S. Di Giacomo, Auteur ; RICARDO Matus, Auteur ; OLIVIA Blank, Auteur ; Robert E. Wilson, Auteur ; Kevin G. McCracken, Auteur

Dans Bird Conservation International (24(1) MAR 2014)

Sheldgeese of the genus Chloephaga are waterfowl (Anatidae) endemic to mainland South America and the Falkland Islands (Malvinas). Continental populations of three species C. picta, C. poliocephala, and C. rubidiceps breed in Patagonia and Tierr[...]

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Article

Phylogenetic relationships of Amazonetta, Speculanas, Lophonetta, and Tachyeres: four morphologically divergent duck genera endemic to South America

Mariana Bulgarella, Auteur ; Michael D. Sorenson, Auteur ; Jeffrey L. Peters, Auteur ; Robert E. Wilson, Auteur ; Kevin G. McCracken, Auteur

Dans Journal of Avian Biology (41(2) MAR 2010)

We studied the phylogenetic relationships of four duck genera endemic to South America: Brazilian teal Amazonetta brasiliensis, spectacled duck Speculanas specularis, crested duck Lophonetta specularioides, and four species of steamer ducks Tach[...]

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Article

Are Ruddy Ducks and White-headed Ducks the same species?

Kevin G. McCracken, Auteur ; J. Harshman, Auteur ; Michael D. Sorenson, Auteur ; Kevin P. Johnson, Auteur

Dans British Birds (93(8) August, 2000)

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