Austin, J., M. Miller, D. Haukos, J. Fleskes, R. Clark, and K. Guyn. 2013. Northern Pintail (Anas acuta), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/163
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