FAO (2015) The second report on the state of the world’s animal genetic resources for food and agriculture. In: Scherf BD, Pilling D (eds). FAO Commission on Genetic Resources for Food and Agriculture Assessments Rome. http://www.fao.org/3/a-i4787e/index.html. Accessed 7 June 2020 Gordh G, Beardsley JW (1999) Taxonomy and biological control. In: Bellows TS, Fisher TW (eds) Handbook of biological control: principles and applications of biological control. Academic Press, Amsterdam, pp 45–55. isbn 978-0-12-257305-7 Carefoot WC (1996) Chocolate: a sex-linked recessive plumage colour mutant of the domestic fowl. Br Poult Sci 37:867–868 Cheng YS (1995) Sélection de la race Tsaiya Brune sur la ponte et la durée de la fertilité en croisement avec le canard de Barbarie. Thèse. Institut National Polytechnique de Toulouse, France

Cheng YS, Rouvier R, Poivey JP, Tai C (1996) Prediction of genetic gains in body weight, egg production and shell quality traits in the laying Brown Tsaiya ( Anas platyrhynchos). Genet Sel Evol 28:443–455Liu SC, Huang JF, Sun TJ, Lee SR, Wang CT (1998) The inheritance of blue eggshell in brown Tsaiya. J Taiwan Livest Res 31(4):373–382

Distribution: An introduced species, the main population is in the south, central and eastern areas of England, but there are small numbers in northern England, Wales and Scotland. Mayr G, De Pietri VL, Scofield RP, Worthy TH (2018) On the taxonomic composition and phylogenetic affinities of the recently proposed clade Vegaviidae Agnolín et al 2017 – neornithine birds from the Upper Cretaceous of the Southern Hemisphere. Cretaceous Res 86:178–185 Gupta J, Singh A, Churchil RR, Singh BP, Sharma D (2005) Genetic divergence between red jungle fowl and other domesticated poultry species using 12S rRNA gene polymorphism. Indian J Anim Genet Breed 26(1–2):26–30

What types of duck are there?

Rouvier R, Mialon MM, Salzmann F, Poujardieu B (1988) Fertilité et éclosabilité des oeufs d’une souche de cane Pékin (Anas platyrhynchos) en croisement interspécifique avec le Barbarie (Cairina moschata) par insémination artificielle. Ann Zootech 37:73–86