Attributes / relations provided by
♦ ¹A comparative study of egg mass and clutch size in the Anseriformes, Jordi Figuerola and Andy J. Green, J Ornithol (2006) 147: 57–68
♦ ²Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
♦ ³Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
♦ ⁴del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ ⁵Jetz W, Sekercioglu CH, Böhning-Gaese K (2008) The Worldwide Variation in Avian Clutch Size across Species and Space PLoS Biol 6(12): e303. doi:10.1371/journal.pbio.0060303
♦ ⁶Young, HG, MD Sorenson, and KP Johnson. 1997. A description of the Madagascar Teal Anas bernieri and an examination of its relationships with the Grey Teal A. gracilis. Wildfowl 48:174–180

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