In recent decades, the increased use of chemicals in many industries has led to environmental pollution of water, soil and also wildlife. In addition to plant protection substances and human and veterinary medical drugs, rodenticides have had toxic effects on wildlife. A new scientific investigation from scientists of the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW), the Julius Kühn Institute (JKI) and the German Environment Agency (Umweltbundesamt—UBA) demonstrate that these substances are widely found in liver tissues of birds of prey from Germany.