As I grew up on a small farm next to a deeryard, red deer and deer hunting have been a part of my life for as long as I can remember and probably determined my interests and choice of profession. I experienced my first red deer hunt as a 4-year-old boy sitting next to my father; I was excited and probably a bit terrified. At age 15, I shot my first deer, and at age 21, I met Rolf Langvatn. These milestones have affected me ever since! There are many people who I wish to thank. I owe a great debt of gratitude to my three supervisors: Atle Mysterud, Leif Egil Loe and Atle Wibe. I met my primary supervisor, Atle Mysterud, approximately 15 years ago, and we immediately found a "tone" that developed into a unique collaboration and friendship. Atle, you are the "engine" of the red deer group, and with your deep understanding of ecology and genuine interest in ungulate ecology, you are an inspiration to me. Thank you for teaching me the craft of writing scientific papers, even though I will never match your skills. It has been a privilege to have a supervisor willing to return a much improved draft within hours. Thank you for the excellent collaboration so far; I hope we can continue to develop it in the future, in terms of both science and hunting! Leif Egil, we met on Svalbard as early as 1996; you as an incoming student with Rolf Langvatn and I as a former. Although we were a good reindeer-catching team, we were joined by the red deer. Since our early work on "teeth" together, we have moved on to GPS data and space use. Without your knowledge of R and your excellent analytical skills, the analyses of the GPS data and this thesis would have been impossible. Our cooperation has been excellent, and as with Atle, I hope it will continue. To both you and Atle, thank you for your generous hospitality during my occasional drop-ins in Oslo. Special thanks go to Rolf Langvatn. Rolf, I am very grateful that you welcomed me as a young student and brought me into the world of science in the early 1990s. Your fabulous skills concerning both red deer and the collection and care of scientific data were a vital education to me. Without you, I never would have become a scientist or (perhaps) a red deer "specialist", but I'll never meet your standard! Additionally, thanks to the red deer group for the many years of excellent collaboration, especially Arve Aarhus, Inger Maren Rivrud, Unni Støbet Lande, Vebjørn Veiberg, Barbara Zimmermann and Richard Bischof. Thanks especially to Øystein Brekkum, my right hand for many years on the red deer marking projects, for cleaning up my messes and helping me keep all of the information and data together. Without