Bignal, E.M., Curtis, D.J. & Matthews, J.L. (1988). Islay: Land Types, Bird Habitats and Nature Conservation, Part 1: Landuse and Birds on Islay. NCC Chief Scientist Directorate Report 809 (Part 1), Nature Conservancy Council, Peterborough, England, UK: xi + 240 pp., illustr.
Bullock, I.D. (1980). Some aspects of the ecology of the Chough Pyrrhocorax pyrrhocorax at South Stack, Anglesey, November 1978–October 1979. MSc thesis, University of Wales, UK: x + 140 pp., illustr.
Doube, B.M. (1987). Spatial and temporal organizaton in communities associated with dung pads and carcasses. Pp. 255–80 in Organization of Communities — Past and Present (Eds Gee, J.H.R. & Giller, P.S.). Blackwell Scientific, Oxford, England, UK: x + 360 pp., illustr.
Hill, M.O. (1979 a). TWINSPAN — a FORTRAN Program for Arranging Multivariate Data in an Ordered Two-way Table by Classification of the Individuals and Attributes. Cornell University Press, Ithaca, New York, USA: iv + 90 pp., illustr.
Hill, M.O. (1979 b). DECORANA — a FORTRAN Program for Detrended Correspondence Analysis and Reciprocal Averaging. Cornell University Press, Ithaca, New York, USA: iii + 52 pp., illustr.
Luff, M.L. & Rushton, S.P. (1989). The ground beetle and spider fauna of managed and unimproved upland pasture. Agriculture, Ecosystems and Environment, 25, pp. 195–205.
McCracken, D.I. (1990). Factors affecting the availability of invertebrate food for the Chough, Pyrrhocorax pyrrhocorax L. PhD Thesis, University of Glasgow, Glasgow, Scotland, UK: xx + 199 pp., illustr.
McCracken, D.I., Foster, G.N., Bignal, E.M. & Bignal, S. (in press). An assessment of Chough Pyrrhocorax pyrrhocorax diet using multivariate analysis techniques. Avocetta.
Monaghan, P., Bignal, E., Bignal, S., Easterbee, N. & McKay, C.R. (1989). The distribution and status of the Chough in Scotland in 1986. Scottish Birds, 15, pp. 114–8.
Warnes, J.M. (1982). A study of the ecology of the Chough Pyrrhocorax pyrrhocorax L. on the Isle of Islay, Argyll, 1980–1981. MSc thesis, University of Stirling, Stirling, Scotland, UK: 68 pp., illustr.