I am Jolle Jolles, a Severo Ochoa postdoctoral researcher at the Center for Ecological Research and Forestry Applications (CREAF) in Barcelona, Spain. I use an interdisciplinary approach and combines controlled laboratory experiments, with field observations, and computer simulations to study the role of phenotypic variation among grouping animals and its consequences across social and ecological scales. I have a background in Behavioural Ecology and Experimental Biology and have worked with a range of model species, from corvids and rodents to fish. My PhD work (University of Cambridge, 2016) provides experimental and theoretical evidence for a simple mechanism to explain collective behaviour from phenotypic variation among grouping individuals. With my postdoctoral work I have developed a comprehensive framework that shows the important role of individual heterogeneity in animal groups and communities. I have also been pushing the use of low-cost, open electronics in the study of Ecology and Animal Behaviour. With my ongoing work I am bridging out to the fields of Ecology and Environmental Science and use an individual-based approach to understand how animal populations cope with environmental change.