TY - RPRT TI - Magnetic compass orientation behaviour of Eurasian blackcaps at the predicted 110-120 MHz upper cut-off frequency for radiofrequency-field effects AU - Leberecht, B. AU - Satish, B. AU - Schwigon, L. AU - Venkatraman, L. AU - Borowsky, L. AU - Orthmann, J. AU - Ippen, F. AU - Wynn, J. AU - Hore, P. J. AU - Mouritsen, H. PY - 2026 DO - 10.64898/2026.05.21.726905 UR - https://www.biorxiv.org/content/10.64898/2026.05.21.726905v1 ID - 10.64898/2026.05.21.726905 ER -