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.
Tu nema dvojbe -- njemački par ornitologa, Wolfgang i Roswitha Wiltschko, 1970-ih,  su čak potvdili da crvendać pronalazi svoj put nekako osjećajući Zemljino magnetsko polje koje mu daje informaciju smjera -- ugrađeni kompas.