For the last two weeks, Gwendoline Traisnel has been visiting the MARS team. She is a Ph.D. student at Nelson Mandela University, Port Elizabeth, South Africa. Her studies focus on the behavioral ecology of African penguins. She analyses between-individual variation in behavior and its influence on population dynamics during climate change. The reason for visiting the MARS group is to develop an individual-based model to predict the impact of reduced prey availability on adult and chick African penguin survival rates.