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1by Pöysä, Hannu, Elmberg, Johan, Gunnarsson, Gunnar, Holopainen, Sari Taija, Nummi, Petri Johannes, Sjöberg, Kjell“... on wetlands with abundant horsetail (Equisetum spp.), a plant providing food for Whooper Swan and crucial...”
Published in Journal of Ornithology (2021)
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