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2011 The Chilterns Breeding Season

The average number of chicks in a sample of 77 visited nests was 1.65 (127/77) with 11 broods of 3, 28 broods of 2 and 38 singles.

162 breeding pairs were located, of which 111 were successful to the stage of hatching eggs while 17 failed. The outcome of the remaining 34 is unknown.