Occurrence of the Red-flanked Bluetail (Tarsiger cyanurus) in Finland and some remarks concerning its expansion to the west
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Helminen, M. (1958). Occurrence of the Red-flanked Bluetail (Tarsiger cyanurus) in Finland and some remarks concerning its expansion to the west. Ornis Fennica, 35(2–3), 51–64. Hämtad från https://ornisfennica.journal.fi/article/view/132621