Abstract A long-term study of the Common Buzzard Buteo buteo population on the islands of Colonsay and Oronsay, Argyll, was carried out during 1988–2019. Until 2010, the islands held between 18 and 28 occupied territories. Subsequently, numbers dropped to 8–9 pairs while, at the same time, there was an increase in the number of Golden Eagles Aquila chrysaetos and


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