The aim of our gull team is to understand patterns of ageing and to identify consequences of environmental pollution on life-history traits in order to assess how species may adapt to these perturbations. Long-lived seabirds such as the common gull (Larus canus) are especially interesting in this context because they are exposed to a cocktails of pollutants, originating from both air and water, and they are at the top of the food chain, meaning they can be impacted by contaminated preys.