T H E C H O U G H S {Pyrrhocorax pyrrhocorax) of Bardsey Island, off the coast of Caernarvonshire, have been a constant source of interest since the bird observatory opened there in 1953. O n e or two pairs have nested in most years and forty-seven young have been successfully raised. These have all been ringed, but so far not one has returned to breed and the only two recoveries have been local (...

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