Dale S. Facultative migration in two thrush species (Fieldfare and Redwing): Rowanberry abundance is more important than winter weather. Ornis Fenn [Internet]. 18. lokakuuta 2024 [viitattu 25. lokakuuta 2024];101(1–2):1-15. Saatavissa: https://ornisfennica.journal.fi/article/view/125940