The European Dipper, a remarkable songbird known for its ability to hunt underwater, serves as a key indicator of the health of freshwater ecosystems and is the focus of my master’s research. With the support of this scholarship, I will conduct fieldwork in France and present my findings at the European Ornithology Conference in Bangor, UK. I will spend two months in the Massif de la Chartreuse, studying the dipper population. My work will involve collecting samples, monitoring health traits, and observing reproductive efforts. Subsequent laboratory work at the Swiss Ornithological Institute, combined with detailed data analysis, will allow me to investigate how mercury pollution affects the birds' physiology and fitness. The aim of this project is to deepen the understanding of how mercury pollution affects bird health, reproduction, and survival. This research will provide valuable insights into the broader effects of environmental pollution on avian populations and contribute to wildlife conservation efforts.