Infections with parasites often entail no recognisable signs in many wildlife species, but can have still negative effects across generations. Infected animals often have a slightly reduced body size and their offspring have a harder start in life. A team of scientists from the Leibniz Institute for Zoo and Wildlife Research (Leibniz-IZW), the Technische Universität Berlin and the University of Potsdam now have shown for the first time, that the impaired reproductive success is connected to altered movement behaviour: Infected starlings have a smaller action radius, which limits their access to high-quality foraging habitats. T