Literature on resource selection by animals is a maze of methodologies for data collection and interpretation. Field biologists need a guide through the labyrinth - this book aims to provide such a guide. It gives a clear and consistent framework for the study of how animals select their resources (food and habitat), by taking the reader through different types of study design. The authors have clearly identified the need to pull together the diffuse literature, and biologists should greatly improve their experimental design, methodology, and analysis with the information provided. A second edition, the text has been updated to include many developments. There is material on discrete choice models, the analysis of data from geographical information systems, compositional analysis, Mahalanobis distance methods, and neural networks and related approaches.