On 23rd June 2019, at Fairburn Ings RSPB, Yorkshire, I saw a Carrion Crow Corvus corone attack and kill, and devour a juvenile Black headed Gull Chroicocephalus ridibundus. Two Carrion Crows appeared to work in tandem. One flew over the gull, landing about 1 m beyond as if to distract it. This bird took no further part in the attack, but about ten seconds later a second crow swooped

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