Bobolink (Dolichonyx oryzivorus) Science Article 1
The magnetic characteristics of the heads from 28 bobolinks [Icteridae:Dolichonyx oryzivorus (L.)] were analysed using remanence magnetometers. Thenatural remanent magnetization of 12 freshly preserved heads averaged 3-20xl0~7electromagnetic units (e.m.u.) (le.m.u. = 103Am~’) and was oriented horizontallyfrom side to side. An electromagnet was used to induce magnetization with externalfield strengths of up to O^Tesla (T).
ROBERT C. BEASON and WILLIAM J. BRENNAN, J. exp. Biol. 125, 49-56 (1986)