Newson, S.E., Mitchell, P.I., Parsons, M., O'Brian, S.H., Austin, G.E., Benn, S., Black, J., Blackburn, J., Brodie, B., Humphreys, E., Leech, D., Prior, M. & Webster, M. 2008. Population decline of Leach's Storm-petrel Oceanodroma leucorhoa within the largest colony in Britain and Ireland. Seabird 21: 84.