Blackcaps (Sylvia atricapilla) are one of the most common bird species in Europe, and the most common in Austria. Across their range, they show a multitude of migratory strategies. Birds in the South are mostly sedentary, and the further North they breed, the longer their migrations get. Some populations can be found South of the Sahara Desert in winter. A research group from the Max-Planck Institute for Evolutionary Biology in Plön – in collaboration with researchers from the Austrian Ornithological Centre at the Konrad Lorenz Institute of Ethology in Vienna – set off to investigate the variability of their migratory strategies, using geolocators which are attached to the bird´s bodies.