english: That's not in doubt -- a German couple of ornithologists, Wolfgang and Roswitha Wiltschko, in the 1970s, confirmed that indeed, the robin does find its way by somehow sensing the Earth's magnetic field, to give it directional information -- a built-in compass.
non_english: Ovo ne podleže sumnji - nemački par orintologa, Volfgan i Rosvita Vilčko, 1970-ih potvrdili su da crvendać zaista nalazi svoj put osećajući nekako Zemljino magnetno polje koje pruža informacije o pravcu, ugrađeni kompas.