Mass irruption of Long-tailed Tits Aegithalos caudatus in Northern Europe in 1973
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Hildén, O. (1977). Mass irruption of Long-tailed Tits Aegithalos caudatus in Northern Europe in 1973. Ornis Fennica, 54(2), 47–65. Hämtad från https://ornisfennica.journal.fi/article/view/132928
