On 4th June 2012, in a neighbour's garden in West Bagborough, Somerset, I observed a pair of Blue Tits Cyanistes caeruleus carrying food into a nest site deep in a natural site in an apple Malus tree. As one of the tits, which was carrying a caterpillar, flew towards the nest tree it was attacked and then chased by a male Blackbird Turdus merula; the tit was pursued closely for almost 10 m when it ...

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