Data used to infer the resource needs of red squirrels (Sciurus vulgaris) in Furzey Island, southern UK. Inference was made by applying Resource-Area-Dependence Analysis (RADA) to a sample of 15 red squirrel home ranges and a thematic map depicting resource distribution. The compressed archive contains the two datasets: i) standardized 30 locations per home range obtained via VHF telemetry between October 1991 and January 1992 and 2) the thematic map containing two map classes digitized from aerial photography. All coordinates are in UK National Grid format (EPSG 27700). Each dataset is provided as: (i) .txt (locations) and .shp (vector map) and (ii) .loc (locations) and .ves (vector map). Formats in (ii) are native to the Ranges suite of software (http://www.anatrack.com/home.php) for the analysis of animal home ranging and habitat use. Since its first release in 1990, Ranges has been used in analyses underpinning dozens of publications in scientific journals (ex. http://www.anatrack.com/publications.php). The release of the latest version, Ranges 9, was used for RADA outputs in this paper. A DEMO of Ranges 9, which allows for opening and visualizing the data files provided herein, is available for download without charge (http://www.anatrack.com/try_ranges.php). RADA itself is available in the full Ranges 9 version (http://www.anatrack.com/ranges_compare_versions.php)