On 2nd February 2019, CE was mist-netting at a garden feeder near Hexham, in Northumberland, at a site where he has trapped in excess of 20,000 Great Tits Parus major and Blue Tits Cyanistes caeruleus (approximate ratio 1:2) since 1985. A first-winter tit was trapped that was the size of a Great Tit but with some plumage characteristics of a Blue Tit. CE contacted CR for an independent view, and C

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