Ibis, 2016 Staff Author(s) Citation Mcmahon, B.J., Purvis, G., Sheridan, H., Siriwardena, G.M. & Parnell, A.C. 2016. A novel method for quantifying overdispersion in count data and its application to farmland birds. Ibis doi:10.1111/ibi.12450 Staff author(s) Gavin Siriwardena