Geography, Animal feeding behavior, Climatology, Ethology, Geomorphology, Molecular genetics, Environmental sciences, Zoology, Foraging, Population studies, Biology, Animal husbandry, Mathematics, Bodies of water, Genetics, Environmental studies, Agriculture, Sea birds, Parametric models, Aviculture, Waterfowl, Oceans, Breeding, Animal science, Social scienc...
Life Sciences, Plants, Wetland ecology, Other, Ducks