Materials related to Caravaggi A, Irwin S, Lusby J, Ruddock M, O'Toole L, Mee A, Nagle T, O'Neill S, Tierney D, McCarthy A & O'Halloran J. (in press) Factors influencing Hen Harrier, Circus cyaneus, territory site selection and breeding success. Bird Study. doi: 10.1080/00063657.2019.1692778 Contents 1_forestry_prep.R - Generation of bespoke forest shapefiles, categorised by type (i.e. broadleved or coniferous) and, where coniferous, by age. 2_pseudoabsences.R - The generation of pseudoabsences for use in models. 3_models.R - Data extraction and manipulation, modelling procedures and the generation of plots. 4_spas.R - SPA-specific habitat data (see Fig. 5 in the manuscript). Data used in this project were subject to confidentiality and data sharing agreements, therefore this repository contains code, only.