Nordamerika kreko (Esperanto Wikipedia)

Analysis of information sources in references of the Wikipedia article "Nordamerika kreko" in Esperanto language version.

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Johnson, Kevin P. McKinney, Frank; Wilson, Robert & Sorenson, Michael D. (2000): The evolution of postcopulatory displays in dabbling ducks (Anatini): a phylogenetic perspective Arkivigite je 2006-01-05 per la retarkivo Wayback Machine. Animal Behaviour 59(5): 953–963

(1979) “The nod-swim display of male green-winged teal ()”, Animal Behaviour 27, p. 165. doi:10.1016/0003-3472(79)90136-2.
(2002) “Taxonomic recommendations for European birds”, Ibis 144, p. 153. doi:10.1046/j.0019-1019.2001.00026.x.
(1988) “The influence of male dominance on social interactions in black ducks and mallards”, Animal Behaviour 36 (5), p. 1371. doi:10.1016/S0003-3472(88)80206-9.

BirdLife International (2004). Anas crecca. Internacia Ruĝa Listo de Endanĝeritaj Specioj, eldono de 2006. IUCN 2006. Elŝutita 11a Majo 2006. Kriterioj kial tiu specio estas Malplej Zorgiga

A classification of the bird species of South America. Arkivita el la originalo je 2009-03-02. Alirita 2011-12-17.
Livezey, B. C. (1991): A phylogenetic analysis and classification of recent dabbling ducks (Tribe Anatini) based on comparative morphology Arkivigite je 2012-11-12 per la retarkivo Wayback Machine. Auk 108(3): 471–507.
Johnson, Kevin P. & Sorenson, Michael D. (1999): Phylogeny and biogeography of dabbling ducks (genus Anas): a comparison of molecular and morphological evidence Arkivigite je 2007-02-05 per la retarkivo Wayback Machine. Auk 116(3): 792–805.
Rhymer, Judith M.; Williams, Murray J. & Braun, Michael J. (1994). Mitochondrial analysis of gene flow between New Zealand Mallards (Anas platyrhynchos) and Grey Ducks (A. superciliosa) Arkivigite je 2011-06-06 per la retarkivo Wayback Machine. Auk 111(4): 970–978.
Johnson, Kevin P. McKinney, Frank; Wilson, Robert & Sorenson, Michael D. (2000): The evolution of postcopulatory displays in dabbling ducks (Anatini): a phylogenetic perspective Arkivigite je 2006-01-05 per la retarkivo Wayback Machine. Animal Behaviour 59(5): 953–963