Dr. Spiros Mourelatos, the coordinator of the EWSMD (Early Warning System for Mosquito-borne Diseases) research project, and Mr. Paraschos Tsagaris show live mosquito larvae in a fish tank and, on the basis of a video, explain where mosquito breeding sites are hidden in private areas and how we can handle them. The active involvement of citizens in the control of mosquito breeding sites in their own environment represents an important tool for the risk mitigation of mosquito-borne diseases such as West Nile Virus.