Orr is a faculty member at the School of Zoology, Faculty of Life Sciences, Tel Aviv University. His research focuses the on behavioral and movement ecology of terrestrial vertebrates, and in particular on individual variation. His group studies the various factors that affect animal space use, the patterns of animal movements, and their consequences. They cover evolutionary aspects (e.g., host-parasite interactions and individual fitness), ecological aspects (e.g., population dynamics and species coexistence), and applied aspects (conservation, management, and epidemiology). This research was also conducted in collaboration with Noa Pinter-Wollman from the Department of Ecology and Evolutionary Biology, University of California Los Angeles, Los Angeles, California, USA. Find out more about her research here and follow Noa on Twitter here.