Hanja is a behavioural ecologist exploring the effects of stress on social behaviour, pair-bonding, and group function in zebra finches. She has completed a Joint PhD at University of Hamburg and Macquarie University, where she studied social behavior and information use of free-living zebra finches in the Australian outback. Her research interest is focused on different aspects of social behaviour, such as social information transfer, causes and consequences of maintaining social associations over time, and how environmental factors affect social ties. Hanja is a postdoc in the Center for the Advanced Study of Collective Behaviour and in the Farine lab. Here she will develop a range of experiments on captive birds combining differences in early-life experiences with short-term experimental manipulations of individuals, linking individual stress physiology to collective animal behaviour in birds.