# Superparamagnetic Magnetite in the Upper Beak Tissue of Homing Pigeons

@article{Hanzlik2004SuperparamagneticMI,
title={Superparamagnetic Magnetite in the Upper Beak Tissue of Homing Pigeons},
author={Marianne Hanzlik and Ch Heunemann and Elke Holtkamp-R{\"o}tzler and Michael Winklhofer and Nikolai P. Petersen and Gerta Fleissner},
journal={Biometals},
year={2004},
volume={13},
pages={325-331}
}
• Published 1 December 2000
• Biology
• Biometals
Homing pigeons have been subject of various studies trying to detect magnetic material which might be involved in magnetic field perception. Here we focus on the upper-beak skin of homing pigeons, a region that has previously been shown to contain nerves sensitive to changes of the ambient magnetic field. We localized Fe3+ concentrations in the subcutis and identified the material by transmission electronmicroscopy (TEM) as aggregates of magnetite nanocrystals (with grain sizes between 1 and 5…
124 Citations

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